軍団ぐんだん
gundan

Noun

1. army corps; corps

その軍団ぐんだん戦闘せんとうちゅうおうくのかがやかしい作戦さくせん従事じゅうじした。
sono gundanwa sentōchū ōkuno kagayakashii sakusenni jūji shita.
The army was involved in a number of brilliant actions during the battle.