User blog comment:Word Bearer333/Best Space Marine Legion?/@comment-3580035-20130324063147

Alpha Legion and Raven Guard and some Night Lords would be left standing because they were smart enough to let everybody else get wiped before destroying the remainder. Stealth legions ftw!

(Then everybody left standing turns out to be Alpha Legionnaires in disguise :D)

Yes, I am biased towards Alpha Legion and Raven Guard.

If this was serious, the Alpha Legion would probably wipe out 90% of everyones forces before they even got to the battlefield through Thrawn-level tactics.