連合 れんごう こく最高 さいこう司令 しれい かん そう司令 しれい であれば
rengōkokusaikōshireikan sō shire ibudeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 連合国最高司令官総司令部

1. If the General Headquarters of the Supreme Commander for the Allied Powers; Were the General Headquarters of the Supreme Commander for the Allied Powers

Ba Conditional