日米にちべい安全あんぜん保障ほしょう条約じょうやくじゃなかったです
ni chi bēanzenhoshōjōyakujanakattadesu

Noun
Desu Copula

The polite, past negative form of 日米安全保障条約

1. It wasn't the Japan-US Security Treaty.

Past/Perfective
Negative
Polite
Casual Register