343 wrote:Can I play as space marines and space wolves.(in the same army) also space marines and chaos space marines.
If you are asking if you can make an army list using one force organization chart, and pull units from both the Space Marines codex and the Space Wolves codex, I believe the answer is "no". One of the two armies (vanilla Marines or Space Wolves) must be your "primary detachment" (your main army). You can only use one list when writing up your primary detachment. You are, however, free to use allies. Allies take force organization slots from a "secondary detachment" and are limited in what types of units and how many they can take. Consult the core rulebook for
40K for more information.
If you are asking if Space Marines and Chaos Marines can be in the same army/ally with each other, the answer is "VERY NO." for further information as to why not, consult your core rulebook for
40K or the parts of Codex: Chaos Space Marines that deal with the history of that faction.