銃後 is read as じゅうご (juugo) and means home front.
じゅうご
juugo
じゅうさつ
death by shooting
じゅうげき
shooting
じゅう
gun
じゅうせい
sound of a gunshot
じゅうだん
bullet (from a rifle)
じゅうき
small arms
じゅうこう
gun point
じゅうしん
gun barrel
じゅうほう
guns
じゅうか
gunfire
じゅうけん
bayonet
じゅうきせいほう
gun control law