防御 ぼうぎょ部隊 ぶたいじゃなかったです
bōgyobutaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 防御部隊

1. Was not a defense force.; Wasn't part of the defense force.

Past/Perfective
Negative
Polite
Casual Register