fortune in battle; luck in war; fate as a warrior
Refers to a warrior's luck or destiny in combat. Often used in set phrases like 武運を祈る (praying for success in battle).
出陣する兵士たちに武運を祈った。
They prayed for the soldiers' fortune in battle as they departed.
彼は
His luck in war was poor, and he died in his first battle.