Board Thread:Warhammer 40k General Discussion/@comment-58.179.157.107-20140511083958/@comment-24661246-20140512093025

Sanguinious was the best choice for warmaster. Horus himself felt so. Lion would also have been appropriate but he was not as chrasimastic as the other two.

However Horus had never lost a battle, this was the reason he was chosen.