The Observer wrote:
Hey everyone! I have some quick questions regarding the Raven Guard. Caution there may be some Spoilers to the book Deliverance Lost.

1.) In Deliverance Lost the RG is gifted with a huge amount of Mark VI armour. Was it eniugh to equip the whole Legion? Keep in mind that they were pretty decomated at that Point thanks to the Events on Istvaan.
2.) Were they present on Terra during ist siege? If so, what was their role?
3.) Who was the legions praetor? Were there multiple ones?

A huge thanks for everyone who responds

Commander Arendi - Commander of Corax's bodyguard during the Horus Heresy who was killed during the Drop Site Massacre on Istvaan V.
Commander Alconi - Commander of the "Falcon" Assault Companies of the Raven Guard during the Horus Heresy era.
Commander Branne Nev - Branne was a Raven Guard Captain during the Horus Heresy era, and Captain Agapito's biological brother. He joined the other Raven Guard officers in drawing lots to see which amongst their number would take part in the campaign on Istvaan V against the Traitor Legions of Horus. Captain Branne lost and so was assigned as the commanding officer of the Raven Guard garrison that remained on Deliverance while the rest of the Legion deployed to Istvaan V. Eventually he led the mission that resulted in the successful combat extraction of Corax and the few Raven Guard Astartes who survived the Drop Site Massacre. Commander Branne essentially saved his Legion from extinction at the hands of the Traitor Legions. As the XIX Legion began to rebuild itself following the massacre Branne was appointed by Corax to serve as the Legion's new Master of Recruits. Upon the induction of the first cadre of new Raven Guard Astartes, he was named the Commander of the Raptors, the name given to the new Raven Guard companies raised using the pure Primarch DNA and the accelerated growth protocols
Captain Agapito Nev - Agapito was a Raven Guard Captain and the Commander of the "Talon" Tactical Companies of the Horus Heresy-era Raven Guard Legion. Agapito was the biological brother of Commander Branne. Both of them were part of the original rebel group of Lycaeum prisoners that was lead by Corax to freedom before the arrival of the Emperor in the Kiavahr System. Agapito was suspicious of the unusual actions of some Raven Guard Astartes who were actually Alpha Legion agents, and he confronted the infiltrators.
Captain Aloni Tev - Aloni was a Raven Guard Captain and the Commander of the "Falcon" Assault Companies of the Horus Heresy-era Raven Guard Legion.
Captain Solaro An - Solaro An was a Captain of the Raven Guard who took part in the Istvaan V campaign. He led Raven Guard Bike Squads in an ambush against the Traitor Legions. However, he was slain during the Drop Site Massacre. His face was grafted onto an Alpha Legion infiltrator operative, along with some of his organs which were implanted in the impostor, who was then reinserted back into the Raven Guard during the confusion of the campaign on Istvaan V. After the remnants of the Raven Guard were extracted from Istvaan V, he became the commander of the Raven Guard's "Hawk" Companies, which included the Legion's remaining Bike Squads, Land Speeders and aircraft. He took part in the scheme to steal the pure Primarch DNA and destroy the Raven Guard's remaining stocks of untainted gene-seed, mortally wounding Apothecary Vincente Sixx in the process. He and another Alpha Legion operative killed each other after they were discovered and apprehended rather than submit to interrogation.
Captain Torisian - Torisian was the Captain of the 29th Company of the Raven Guard during the Drop Site Massacre on Istvaan V. Torisian and his men were amongst the first warriors to reach the barricades around the drop site erected by the Loyalists' second wave and were cut down in the first volley of treacherous gunfire from the newly-revealed Traitors.