どくそ不可侵 ふかしん条約 じょうやくじゃなかったです
dokuso fukashin jōyakujanakattadesu

Noun
Desu Copula

The polite, past negative form of 独ソ不可侵条約

1. Wasn't the Soviet-Japanese Non-Aggression Pact.

Past/Perfective
Negative
Polite
Casual Register