Board Thread:Warhammer 40k General Discussion/@comment-25618639-20150417014551

A lot of you guys who actively post on the forums now the Warhammer 40k Universe and how it is full of great military leaders. But I want to diverge away from the fictional universe and head into reality a bit. So here is the question: In your opinion who is the greatest military leader in human  history?(real-life)

State the leader's name and why.  