defeat of an army in war / defeated army

march (formal, rhythmic way of walking)

for an army to march

experimental group

the greater part, the most part, large part

(poetic) a mountain where the first-person speaker resides / (by extension, poetic) Synonym of 比叡山 (Hiei-zan): Mount Hiei, where Saichō erected Enryaku-ji, the first Tendai monastery

defense force

(historical, in discussion of history) puppet army

(military) reserve troops / (informal) person who will be a certain person in the future

war dog, dog used in warfare