隊 troop

Careful! There is a whole troop of horny pigs in town. Lock your doors and TIE your windows shut.

army ★★★☆☆
軍 (army) + 隊 (troop) = 軍隊 (army)

an army - but not necessarily the whole army. It could just be some troops.

Japan's army ★★☆☆☆
自衛 (self-defense) + 隊 (troop) = 自衛隊 (Japan's army)

Japan's army, in English called the SDF (self-defense forces)

-squad ★★☆☆☆ SUF

SUFFIX； putting 隊 at the end of any word is like saying 'squad,': 'vice squad', 'turtle squad,' whatever.