先遣 せんけん部隊 ぶたいじゃありませんでした
senkembutaijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 先遣部隊

1. Was not a vanguard unit.; Was not an advance team.; Was not a scouting party.

Past/Perfective
Negative
Polite
Terminal Form