I+fell+--+and+rose+again

This statement is talking about the courage of facing death. The I fell means that if he falls in battle or when he's facing danger it will over take him. However he has a the confidence that he will not stay down. He will rise up and continue to confront this dangerous task. He needs courage to die once and then continue to fight when he knows he might perish again.

Thanks for working through this, Jake. It's a complex poem, and you've clearly given it consideration.