不可侵 ふかしん条約 じょうやくではありませんでした
fukashin jōyakudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 不可侵条約

1. Was not an inviolable treaty.; Was not an unbreachable treaty.

Past/Perfective
Negative
Polite
Formal Register