集団 しゅうだん てき防衛 ぼうえうではありませんでした
shūdante kibōeudewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 集団的防衛

1. Was not collective self-defense.; It was not collective defense.

Past/Perfective
Negative
Polite
Formal Register