regiment
Military unit; in the former Imperial Japanese Army, typically commanded by a colonel.
彼は歩兵連隊に所属していた。
He belonged to an infantry regiment.
連隊旗は部隊の象徴だった。
The regimental flag was a symbol of the unit.
Three regiments took part in that battle.
It was decided that a new regiment would be formed.
He belonged to an infantry regiment.