連合 れんごう こく ぐん最高 さいこう司令 しれい かん そう司令 しれい でしょう
rengō koku gun saikō shi reikan sō shire ibudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 連合国軍最高司令官総司令部

1. Supreme Commander for the Allied Powers headquarters; Probably the Supreme Commander for the Allied Powers headquarters

Polite
Presumptive
Conjecture