条約 じょうやく加盟 かめい こくではありませんでした
jōyakukamei kokudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 条約加盟国

1. Was not a treaty signatory.; Was not a member of the treaty.

Past/Perfective
Negative
Polite
Formal Register