太平 たいへい よう安全 あんぜん保障 ほしょう条約 じょうやくではありませんでした
taiheiyō anzenhoshōjōyakudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 太平洋安全保障条約

1. Was not the Treaty of Mutual Cooperation and Security between the United States and Japan.

Past/Perfective
Negative
Polite
Formal Register