The whole victory or death mentality makes sense if you have a tribe of savages with no military discipline. Better to convince your troops to fight to the bitter than risk losing a battle because panic in the ranks.

The problem of this mentality is eventually you'll face a superior enemy force and now you have no way out of situation once the battle starts. Victory or DEATH remember?

And yet...

Just saying... don't make your warcry about going all in if you gonna pussy out because your leader fell in battle.