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What strategy/tactics would they use? Each enemy is equivalent of Great Crusade era Imperial Army, no aid from other legions or IA. Add the Emperor with his Custodes too and any scenario that I missed

1)Taking a Hive

2)Defending a Hive

3) Field Battle

4) Strategic retreat

5) Void Battle

6) Pacification of a rebelling planet

Speaking as to Death Guard:

1) In one of their 'exemplary battles' in HH book 1 they basically drove a fleet past the planetary defenses (using scrap ships and asteroids as 'shields' from the orbital defenses), slammed a ship into the 'dome' over the hive, and then dropped a crap ton of marines in, using them to basically demolish any and all resistance as they marched up to the head of the hive. I assume other legions would do similar: Drop assault as the first wave, with drop ships landing just outside. Remember: in the fluff, marines could take thousands of 'standard' shots and hardly be phased.

2) "Hey, man those big guns/artillery and let the loosers try to take us. Where's our phosphex stores?" I assume other legions would be similar, barring the phosphex IW and IF loving defending/assaulting a bit more.

3) Land near by, form up, and advance under cover of artillery/fast support. Transports when needed. This one will Vary greatly depending on the legion.

4) What is retreat? In seriousness: leave behind a token 'vanguard' to stall them (probably regular tactical marines + support, nothing to valuable

5) FIRE THE URSUS CLAWS! Seriously: legion fleets were simple: Fire the guns, get close, send over the dreadclaws, void ships, and teleporty termiantors

6) Depends: how did they rebell? For DG it would be utter anhiliation if the 'rebelion' was tyranical. otherwise, kill the army, get rid of the HQ. most legions functioned the same.

Book examples for scenarios:

1) HH book 1, 'Horus Rising'

2) None that I know of?

3) tons, just pick a book and go. Betrayer has more than a few amazing examples from a UM/WE side.

4) none, that I know of? Maybe the second half of the drop site massacre?

5) Betrayer has a bunch of amazing examples

6) 'Horus rising' and 'False gods' both are good examples.

The problem, however, with this question is that the legions were MUCH more varried than chapters are now-a-days. so realistically, there are up to 20 answers to every one of these questions.

Seriously: legion fleets were simple: Fire the guns, get close, send over the dreadclaws, void ships, and teleporty termiantors

Indeed. Some of the legions liked void wars more than others - the Imperial Fists had the biggest fleet of 'proper' warships (compared to oversized, overblinged troop barges) but most fleet battles began with long-ranged gunnery and tended to turn into boarding actions simply because that's what astartes are best at. If you fight broadside-to-broadside you're not taking advantage of the legion's most important weapon - its space marines.

At the same time, Scars shows that the White Scars legion fleet is a lot faster and more manoeuvrable than most legion fleets in Scars you see a fight between the Alpha Legion and White Scars, and the Alpha Legion and Space Wolves. There are also big void battles in Betrayer (Ultramarines, World Eaters, Word Bearers) and Fulgrim (Iron Hands, Emperor's Children).

The Raven Guard have a unique trick - the Reflex Field - which is essentially an 'inside out' void shield that provides a sort of cloaking effect, turning naval war into something more like a submarine vs destroyer hunt. You see this in Deliverance Lost.

Alpha Legion

1) Using a bunch of sympathisers/infiltrators to take the key structures, like Arbites precincts and generatoriums. Meanwhile Marines make sure that any reinforcements get rekt.

2) Booby traps everywhere. Utilise buildings, roads, lamp posts as weapons. Enemy troops walk nearby a huge power bank, when suddendly a huge, electrical shock fries them to cinders. Civillian vehicles filled with explosives, sent against armored columsn. Toppling the whole hive spires on the heads of their enemies. Snipers everywhere.

3) Small cells, a mix of Astartes and Operatives, striking from the flanks and the rear, while the XXth Legion's tanks and heavy infantry elements feint a classic engagement

4) Fighting retreat, while luring the enemy into a trap. Obviously.

5) Half of the enemy's bridge crews are operatives. The battle ends, before it even begins. Also remember that "they have another fuggin' battle barge" behind that moon.

6) The Tesstra Compliance. That's all.

 Xathrodox86 wrote:
5) Half of the enemy's bridge crews are operatives. The battle ends, before it even begins. Also remember that "they have another fuggin' battle barge" behind that moon.

That's no moon...

 Exalted Pariah wrote:
What strategy/tactics would they use? Each enemy is equivalent of Great Crusade era Imperial Army, no aid from other legions or IA. Add the Emperor with his Custodes too and any scenario that I missed

1)Taking a Hive

2)Defending a Hive

3) Field Battle

4) Strategic retreat

5) Void Battle

6) Pacification of a rebelling planet

Ultramarines -

1) "Forward! For the Emperor, and the Glory of Ultramar!"
2) "Stand fast! For the Emperor, and the Glory of Ultramar!"
3) "Forward! For the Emperor, and the Glory of Ultramar!"
4) "Backward! For the Emperor, and the Glory of Ultramar!"
5) "Just pretend that they're Word Bearers, lads!"

 Iron_Captain wrote:

 Xathrodox86 wrote:
5) Half of the enemy's bridge crews are operatives. The battle ends, before it even begins. Also remember that "they have another fuggin' battle barge" behind that moon.

That's no moon...

 Exalted Pariah wrote:
What strategy/tactics would they use? Each enemy is equivalent of Great Crusade era Imperial Army, no aid from other legions or IA. Add the Emperor with his Custodes too and any scenario that I missed

1)Taking a Hive

2)Defending a Hive

3) Field Battle

4) Strategic retreat

5) Void Battle

6) Pacification of a rebelling planet

I don't know everything about all Legions this is just my assumptions.

1. Taking a hive.

I) I honestly don't know much about Pre-Heresy DA but I'd assume they'd bomb the hive then assault with ground troops.
III) The EC would assault the hive with varied forces all working in perfect synchrocity.
IV) The Iron Warriors would lay siege to the hive, bombard it until it was weak and let breaching troops and armour go for it.
V) The White Scars would have a lightning fast land and air assault on the hive to take it out before it could muster any resistance.
VI) The Wolves would mount a close combat assault on the hive.
VII) Imperial Fists would approach in much the same way as the Iron Warriors.
VIII) the Night Lords would use terror tactics into forcing the hive into submission.
IX) BA would launch an aerial close combat assault.
X) Iron Hands would have a mechanised assault supported by artillery.
XII) Berzerker Rush up in this bitch.
XIII) The Ultramarines would assess the situation and come up with a strategy for how to best deal with it.
XIV) The Death Guard would launch a footslogging assault backed up by artillery and armour or they would just virus bomb the place.
XV) The Thousand Sons would use Psychic energy to help them due to them having such limited numbers.
XVI) The SoH would launch one of their famous "spearhead" assaults led by the Justaerin.
XVII) The WB would launch a ground assault whilst encouraging their own troops on.
XVIII) would burn the hive with fire.
XIX) The Raven Guard would launch an aerial assault on the hive.
XX) The Alpha Legion would most likely infiltrate the hive, start causing chaos, and in the chaos the rest of their army would mop up the remaining resistance.

2. Defending a hive.

I) Again, not too sure about the DA but I'd assume they'd stay in the walls and slog it out.
III) would try and orchestrate the perfect defence, with all forces complementing the other.
IV) Read "Iron Cage"
V) Would launch hit and run attacks on the attacking army to throw them off balance.
VI) Would probably charge out and attack the enemy.
VII) Would attempt to set up the ultimate defence, with firing lanes and gun emplacements. Read "Siege of the Emperors palace"
VIII) Would stay inside the walls at daytime but at night they would sneak out and slaughter the enemy in their sleep bit by bit and place their mutilated corpses on the walls.
IX) The Blood Angels would mount a staunch defence like on terra.
X) would have tanks and Infantry defending the walls to the last man.
XII) Berzerker Rush the enemy.
XIII) Big Bobby G would assess all aspects of defending the hive and formulate a battle plan.
XIV) They would set up trenches outside the hive with Infantry and Virus Bombs and they would use artillery support.
XV) Would likely have to fall back a lot due to their small numbers of use a layered defence.
XVI) Not much to say here, they'd defend it whilst taking out key commanders with Terminators.
XVII) would defend the hive whilst their chaplains would put conviction into the Word Bearers.
XVIII) Would set up an armoured defence.
XIX) would draw the enemy in and then Jump pack ambush them.
XX) would be everywhere and nowhere at once, giving the enemy the illusion of victory then smashing them.


3. field battle.

I) Would launch a fast assault at the enemy.
III) would launch a combined arms assault at the enemy.
IV) would set up a defensive gunline with tanks.
V) Swift bike and Jetbike attack.
VI) The Wolves would close with the enemy as fast as possible, then cut them apart.
VII) The Fists would have a mechanised assault.
VIII) They would sow terror before attacking those that haven't already ran off.
IX) Aerial assault with support from ground units.
X) Typical mechanical assault.
XII) Berzerker Rush. Noticing a pattern?
XIII) would formulate a battle plan based on the strengths of the enemy army and would execute it.
XIV) The death guard would use something like the creeping bombardment attack from World War One.
XV) Would use the powers of the warp to aid their troops.
XVI) Spearhead and would cut off the leadership.,
XVII) would assault the enemy with religious conviction.
XVIII) would assault with fire.
XIX) Aerial and Jump Strike attack.
XX) Compliacted and unpredictable battle plan.

4. Strategic retreat

I) Standard strategic retreat.
III) Their pride would not allow them to retreat.
IV) They would slowly fall back and blast their enemies from orbit.
V) Would zoom out of there.
VI) They will never fall back.
VII) Probably something like IW.
VIII) Would disappear into the shadows, daring the enemy to come in after them.
IX) They would fly away.
X) They would draw the enemy into a defensive position.
XII) They wouldn't retreat at any cost.
XIII) Would figure out the fastest and most efficient escape route
XIV) They would never retreat, just dig trenches.
XV) Would get TF out of there due to being outnumbered
XVI) Go back to their ships and blast them from orbit
XVII) standard strategic retreat
XVII) same as above (scorched earth policy?)
XIX) Aerial evacuation
XX) They weren't retreating, that's what they want you to think.

5. Void battle

I) The Dark Angels would assault the enemy ship.
III) Would board and challenge their enemies in CC
IV) would pound them with artillery and breach with breached squads.
V) Immediate fast strikes to throw them off balance.
VI) CC boarding action
VII) Boarding action by breacher teams.
VIII) Infiltrate the enemy ship and wreak havoc
IX) CC assault
X) bombard the enemy into submission
XII) CC assault, no survivors
XIII) predefined battle strategy and formations
XIV) Would use breaching virus rounds to kill the enemy crew.
XV) Warp Storm to destroy enemy ships.
XVI) Attack to decapitate enemy leadership.
XVII) CC assault
XVIII) Boarding action with flamer squads
XIX) CC assault
XX) they're everywhere and you're playing right into their hands




More Coming in this post.

 Exalted Pariah wrote:
1)Taking a Hive

Charge the enemy with a chainsaw sword, bounce off the void shields/armored walls/etc, die.

2)Defending a Hive

Leave cover immediately and charge the enemy with a chainsaw sword, die.

3) Field Battle

Charge the enemy with a chainsaw sword through mass artillery fire, tactical nuclear weapons, etc, and die.

4) Strategic retreat

Space marines do not retreat. Charge the enemy with a chainsaw sword, die.

5) Void Battle

Attempt to charge the enemy with a chainsaw sword across thousands of miles of space, die.

6) Pacification of a rebelling planet

Charge the enemy with a chainsaw sword through mass artillery fire, strategic nuclear weapons, etc, and die.

Cptn_Cronssant wrote:

 Exalted Pariah wrote:
What strategy/tactics would they use? Each enemy is equivalent of Great Crusade era Imperial Army, no aid from other legions or IA. Add the Emperor with his Custodes too and any scenario that I missed

1)Taking a Hive

2)Defending a Hive

3) Field Battle

4) Strategic retreat

5) Void Battle

6) Pacification of a rebelling planet

I don't know everything about all Legions this is just my assumptions.

1. Taking a hive.

I) I honestly don't know much about Pre-Heresy DA but I'd assume they'd bomb the hive then assault with ground troops.
III) The EC would assault the hive with varied forces all working in perfect synchrocity.
IV) The Iron Warriors would lay siege to the hive, bombard it until it was weak and let breaching troops and armour go for it.
V) The White Scars would have a lightning fast land and air assault on the hive to take it out before it could muster any resistance.
VI) The Wolves would mount a close combat assault on the hive.
VII) Imperial Fists would approach in much the same way as the Iron Warriors.
VIII) the Night Lords would use terror tactics into forcing the hive into submission.
IX) BA would launch an aerial close combat assault.
X) Iron Hands would have a mechanised assault supported by artillery.
XII) Berzerker Rush up in this bitch.
XIII) The Ultramarines would assess the situation and come up with a strategy for how to best deal with it.
XIV) The Death Guard would launch a footslogging assault backed up by artillery and armour or they would just virus bomb the place.
XV) The Thousand Sons would use Psychic energy to help them due to them having such limited numbers.
XVI) The SoH would launch one of their famous "spearhead" assaults led by the Justaerin.
XVII) The WB would launch a ground assault whilst encouraging their own troops on.
XVIII) would burn the hive with fire.
XIX) The Raven Guard would launch an aerial assault on the hive.
XX) The Alpha Legion would most likely infiltrate the hive, start causing chaos, and in the chaos the rest of their army would mop up the remaining resistance.

2. Defending a hive.

I) Again, not too sure about the DA but I'd assume they'd stay in the walls and slog it out.
III) would try and orchestrate the perfect defence, with all forces complementing the other.
IV) Read "Iron Cage"
V) Would launch hit and run attacks on the attacking army to throw them off balance.
VI) Would probably charge out and attack the enemy.
VII) Would attempt to set up the ultimate defence, with firing lanes and gun emplacements. Read "Siege of the Emperors palace"
VIII) Would stay inside the walls at daytime but at night they would sneak out and slaughter the enemy in their sleep bit by bit and place their mutilated corpses on the walls.
IX) The Blood Angels would mount a staunch defence like on terra.
X) would have tanks and Infantry defending the walls to the last man.
XII) Berzerker Rush the enemy.
XIII) Big Bobby G would assess all aspects of defending the hive and formulate a battle plan.
XIV) They would set up trenches outside the hive with Infantry and Virus Bombs and they would use artillery support.
XV) Would likely have to fall back a lot due to their small numbers of use a layered defence.
XVI) Not much to say here, they'd defend it whilst taking out key commanders with Terminators.
XVII) would defend the hive whilst their chaplains would put conviction into the Word Bearers.
XVIII) Would set up an armoured defence.
XIX) would draw the enemy in and then Jump pack ambush them.
XX) would be everywhere and nowhere at once, giving the enemy the illusion of victory then smashing them.


3. field battle.

I) Would launch a fast assault at the enemy.
III) would launch a combined arms assault at the enemy.
IV) would set up a defensive gunline with tanks.
V) Swift bike and Jetbike attack.
VI) The Wolves would close with the enemy as fast as possible, then cut them apart.
VII) The Fists would have a mechanised assault.
VIII) They would sow terror before attacking those that haven't already ran off.
IX) Aerial assault with support from ground units.
X) Typical mechanical assault.
XII) Berzerker Rush. Noticing a pattern?
XIII) would formulate a battle plan based on the strengths of the enemy army and would execute it.
XIV) The death guard would use something like the creeping bombardment attack from World War One.
XV) Would use the powers of the warp to aid their troops.
XVI) Spearhead and would cut off the leadership.,
XVII) would assault the enemy with religious conviction.
XVIII) would assault with fire.
XIX) Aerial and Jump Strike attack.
XX) Compliacted and unpredictable battle plan.

4. Strategic retreat

I) Standard strategic retreat.
III) Their pride would not allow them to retreat.
IV) They would slowly fall back and blast their enemies from orbit.
V) Would zoom out of there.
VI) They will never fall back.
VII) Probably something like IW.
VIII) Would disappear into the shadows, daring the enemy to come in after them.
IX) They would fly away.
X) They would draw the enemy into a defensive position.
XII) They wouldn't retreat at any cost.
XIII) Would figure out the fastest and most efficient escape route
XIV) They would never retreat, just dig trenches.
XV) Would get TF out of there due to being outnumbered
XVI) Go back to their ships and blast them from orbit
XVII) standard strategic retreat
XVII) same as above (scorched earth policy?)
XIX) Aerial evacuation
XX) They weren't retreating, that's what they want you to think.

5. Void battle

I) The Dark Angels would assault the enemy ship.
III) Would board and challenge their enemies in CC
IV) would pound them with artillery and breach with breached squads.
V) Immediate fast strikes to throw them off balance.
VI) CC boarding action
VII) Boarding action by breacher teams.
VIII) Infiltrate the enemy ship and wreak havoc
IX) CC assault
X) bombard the enemy into submission
XII) CC assault, no survivors
XIII) predefined battle strategy and formations
XIV) Would use breaching virus rounds to kill the enemy crew.
XV) Warp Storm to destroy enemy ships.
XVI) Attack to decapitate enemy leadership.
XVII) CC assault
XVIII) Boarding action with flamer squads
XIX) CC assault
XX) they're everywhere and you're playing right into their hands




More Coming in this post.

This type of answer I was looking for. Thank you!

No problem. Took me ages to write and I'm not sure it's 100% accurate though.

 Exalted Pariah wrote:
What strategy/tactics would they use? Each enemy is equivalent of Great Crusade era Imperial Army, no aid from other legions or IA. Add the Emperor with his Custodes too and any scenario that I missed

1)Taking a Hive

2)Defending a Hive

4) Field Battle

5) Strategic retreat

6) Void Battle

7) Pacification of a rebelling planet

Dark angels

1) Execute a well thought out stratigic plan resulting in the least amount of casualties

2) Deathwing, Deathwing everywhere

3)Ravenwing

4) Not an option

5) Deathwing

6) See Caliban

My Take on Cptn_Cronssant's Method! (only changing ones where I see a need)

1. Taking a hive) Methodology depends on many factors: Are we minimizing civilian casualties (happened often when trying to make worlds comply)? are we quashing a rebellion? Burning and salting the earth? In any situations where killing civilians isn't a big deal, precede assault with orbital bombardment (most all legions)

I) DA in 30k were a jack-of-all-trades type legion, with an affinity towards "knightly" combat. Most likely an orbital strike supported by certain ground troops.
III) In these situations, the EC would use lots of drop pods, assault squads, and flier transports to get into the hive.
IV) The Iron Warriors bombard the crap out of it. charge in and kill survivors
V) The White Scars use bikes, fliers, and drop troops to get stuck in ASAP.
VI) The Wolves drop all of their stabby stuff into the hive.
VII) Imperial Fists would approach in much the same way as the Iron Warriors.
VIII) the Night Lords would use terror tactics into forcing the hive leadership into surrendering. Kill hive leadership anyways.
IX) BA would launch Drop pod/assault marine orbital assault.
X) Iron Hands would have a mechanised assault supported by artillery.
XII) BULL RUSH THE BUMS! KILL! MAIM! BURN! KILL... erm.... "for the emperor, right guys?"
XIII) The Ultramarines would assess the situation and come up with a strategy for how to best deal with it. use their plot armour and ability to be the best of the best evar to win the day
XIV) Example from fluff: Literally dropping a big ass space ship onto the hive, and then dropping support in through pod and transport. Before going evil, they would try to minimalize civilian casualties
XV) Thousand sons use long range fire power and psychic power to widdle down defenses and the like, then assault. (they were small, but not cripplingly so. they were still the size of at LEAST 10 chapters)
XVI) The SoH would launch an assault aiming for command "tip of the spear" shenanigans
XVII) The WB would launch a 'typical' legion assault. they would send troops specifically towards places of worship and knowledge to loot out anything 'heretical' and burn it.
XVIII) Salamanders are nice guys: assuming negotiations failed, they would assault, but aim to minimalize civilian casualties
XIX) The Raven Guard would launch an aerial assault on the hive.
XX) set aside 3 years, 'convert' half the hive population into sleeper agents. awake sleeper agents to take have.

2. Defending a hive) For the most part, most of their defenses would be similar, what would change is the counter-attack that follows.

I) mount 'standard' defense.
III) mount 'standard' defense. High chance of multiple simultaneous and devastating deep strikes.
IV) Read "Iron Cage" have fun building it up, bombard the crap out of attackers.
V) main forces would man walls. bikes and air vehicles wait for a flank charge or to envelope attackers. possibly try to draw attackers into an ambush as well.
VI) Would probably charge out and attack the enemy. most likely result based on actual fluff
VII) BREAK OUT THE LINCOLN LOGS BOYS, WE'VE GOT OUTSELVES A SIEGE A-BREWIN'
VIII) Night-assaults to break morale.
IX) man the walls. ALSO a high chance of multiple simultaneous and devastating deep strikes.
X) man the walls. Tanks and mechanicum support: shell them!
XII) BULL RUSH THE BUMS! KILL! MAIM! BURN! KILL... erm.... "for the emperor, right guys?" (Psst! we should really teach these dudes tactics or something ) Lots of artillery support from inside the hive and orbital fleets.
XIII) Big Bobby G would assess all aspects of defending the hive and formulate a battle plan. utilize his 'bestest primarch evar' status to win the fight without loosing a single foot of ground . Most likely a very 'generic' defense, jokes aside.
XIV) "hey, chumps are walking at us, wanna use artillery or phosphex this time?"
XV) Magic walls and spells, artillery and mechanicum support. bombard them untill they are close enough for bolters and the like.
XVI) Very generic defense. Possibly use a strike force to take out leadership.
XVII) generic defense. Maybe convince locals to help.
XVIII) shoot them with everything 'till they near the walls, then break out the hammers, shields, and flamers
XIX) standard defense, and AGAIN: more multiple simultaneous and devastating deep strikes.
XX) depends: 1) if the AL want to be known, they break out the special terminators and the martial pride and win the day that way, or 2) if they want to be unknown, get the hive to defend itself, all the while AL snipers pick off leadership


3. field battle) This will be the MOST varied. It should be noted that ALL legions had the ability to bring the bog-standard Bolters w/ big-gun support.

I) Depends: fast assaults, 'standard' assaults, mechanized assaults backed by terminators and dreads.
III) Depends. most likely is a lightning strike by fast and/or outflanking units.
IV) A gunline, with tanks, and artillery, and a few trenches, and a fort
V) BIKES, RHINOS, PODS, PLANES! ATTACK! would probably pull some Genghis Khan crap and lure enemy into a trap.
VI) charge and stab the enemy. lots of deep strike assaults as well.
VII) Depends on many things: A shield wall is quite possible, as is an all out assault, a bolter battle line, and deep strikes.
VIII) Night lords don't do battles they are not 100% certain they would win. if the odds were 50/50 they would leave and wait. Assuming the odds are really in their favor: they would basically toy with their enemy and make a rather bloody mess.
IX) multiple simultaneous and devastating deep strikes.
X) Typical mechanical assault.
XII) CHARGE! KILL! MAIM! BURN! WOOP WOOP WOOP! (seriously, there is a slight subtly to World eaters, I promise! read their books!) Most likely form up and charge. once everyone gets lost and cranky, the sane fellows try to round everyone up.
XIII) Form up and assault. UM have the problem in that they are super generic.
XIV) Against 'terrible' Xenos and irridemable humans: Chem fire, rad grenades, and poison everything. Against other targets: lots and LOTS of infantry and terminators march up the field.
XV) MAGIC, MAN! WOO! they are an infantry 'heavy' legion (light on mechanized elements). they would hang back at bolter range or longer and gun the enemy down.
XVI) Normal assault. A specialized force set asside to go after leadership.
XVII) Normal assault. a decent number of jump packs would be there.
XVIII) 2 options: 1) like DG, minus the chemicals, 2) roll up in our cars, pop out: burn them. hit survivors with hammer.
XIX) Ever see an Ork Commando fight? (or a space shark fight) EXACTLY like that.
XX) 2 options: 1) AL shenanigans that everyone knows, 2) actual battle line (everyone forgets that AL were not just sneaky dudes, but martially proud, well decorated fighters)

4. Strategic retreat) Legions don't really do this, truth be told. the few times it does happen, it's more like them walking backwards rather than retreating. I'll point out the ones where something cool might be happening.

V) Pull some Khan "I lead you to a trap" shenanigans
VIII) Standard Night lord action, actually . They 'retreat' and then come back later to mess with the enemy 'till the NL think they can win.
XII) They keep running at the enemy 'till someone like kharn takes control and demands a fall-back.
XIV) Seriously, even after terra we MARCHED back into the warp, not retreat. keep fighting while rear forces set up some defences, then fall back to those, leaving a burning, irradiated waste for the enemy to slog through while we bombard them.
XV) Magic shenanigans. They were small, but not cripplingly so.
XVII) same as DG (but with no chemicals)
XX) They weren't retreating, that's what they want you to think. <- pretty much

5. Void battle) FIRE THE URSUS CLAWS! Legions, as I said, were super similar in this regard.

I) Void assault
III) Void assault
IV) Void assault + ship-to-ship weaponry
V) Void assault
VI) Void assault
VII) Void assault
VIII) Leave. come back when the ships are more spread out. send entire fleet at 1 enemy ship at a time. works best if enemy ship is civilain transport
IX) Void assault
X) bombard the enemy into submission
XII) Void assault + FIRE THE URSUS CLAWS! also, wake up our dreadnougts.
XIII) Void assault + ship-to-ship weaponry
XIV) Void assault. Chem when needed. We're the masters of Zones mortalis, so nothing really changes for us
XV) Magic shenanigans + ship-to-ship weaponry. Void assault when needed
XVI) Mass attack on Command ship, then Void assault
XVII) Void assault
XVIII) Void assault
XIX) Void assault
XX) 1) when martial: Void assault 2) when sneaky: lead enemy into traps

6) Pacification of rebelling planet) there are to many non-legion specific factors for this one to be an easy answer. What cased the rebellion? are we making an example of them? are we just pulling them in? etc. etc.

 Exalted Pariah wrote:
What strategy/tactics would they use? Each enemy is equivalent of Great Crusade era Imperial Army, no aid from other legions or IA. Add the Emperor with his Custodes too and any scenario that I missed

1)Taking a Hive

2)Defending a Hive

3) Field Battle

4) Strategic retreat

5) Void Battle

6) Pacification of a rebelling planet

VI Legion "Space Wolves"... thought for the Day; "There are no wolves on Fenris...."

1) running forward with a wet leopard growl

2) standing still with a wet leopard growl

3) running forward drunk with a wet leopard growl

4) running backwards still drunk with a wet leopard growl

5) wet leopard growl....IN SPACE!!!!

6) pimp slapping the leader of the bad guys, while drunk and muttering "There are no wolves on Fenris" before letting out a wet leopard growl...

XV: Thousand Sons

1) Search every source possible until they learnt every weakness in the Hive's defences. Exploit these.
2) Lay hidden traps and magic-aided ambushes throughout the city.
3) Send a rain of mid-range, Psychic enhanced firepower from infantry lines.
4) Use magic to protect themselves and confuse the foe.
5) Stay aboard their ship and fire broadside. Use Psychic navigation to outmaneuvere the enemy.
6) Manipulate the minds of the rebels with magic until they are subdued.

 FabricatorGeneralMike wrote:

 Exalted Pariah wrote:
What strategy/tactics would they use? Each enemy is equivalent of Great Crusade era Imperial Army, no aid from other legions or IA. Add the Emperor with his Custodes too and any scenario that I missed

1)Taking a Hive

2)Defending a Hive

3) Field Battle

4) Strategic retreat

5) Void Battle

6) Pacification of a rebelling planet

VI Legion "Space Wolves"... thought for the Day; "There are no wolves on Fenris...."

1) running forward with a wet leopard growl

2) standing still with a wet leopard growl

3) running forward drunk with a wet leopard growl

4) running backwards still drunk with a wet leopard growl

5) wet leopard growl....IN SPACE!!!!

6) pimp slapping the leader of the bad guys, while drunk and muttering "There are no wolves on Fenris" before letting out a wet leopard growl...

Sounds like the Space Wolves of your imagination use rape to get the job done.

Space Wolves of any era are the firefly version of heroes and I don't mean arriving in the nick of time makes you 'big damn heroes Sir' definition.
I mean 'the definition of a hero is somebody who gets other people killed'.

1) Assault the hive and kill everything in the vicinity, find out later they were supposed to rescue somebody who they killed in the crossfire.
2) Defend the hive, argue with the Inquisition who also got involved, execute the Inquisition then wage war on the Inquisition, resulting in massive casualties on both sides.
3) Smash everything on the field then find out that they were sent there by mistake and weren't meant to get involved.
4) Ignore the order for retreat and pursue the enemy into the warp.
5) Send in the Void Claws, kill everything then find out their foe wasn't hostile.
6) Storm in barking orders, kill a mouthy idiot who back-talked then find out he was the guy they were sent to help.