日米 にちべい修好 しゅうこう通商 つうしょう条約 じょうやくでした
ni chibe ishū kō tsūshōjōyakudeshita

Noun
Desu Copula

The polite past form of 日米修好通商条約

1. The Treaty of Amity and Commerce between Japan and the U.S. ; Was the Treaty of Amity and Commerce between Japan and the U.S.

Past/Perfective
Polite