大艦 だいかん巨砲 きょほう主義 しゅぎでした
daikankyohōshugideshita

Noun
Desu Copula

The polite past form of 大艦巨砲主義

1. It was a doctrine of big gun battleships.; It was a belief in overwhelming naval firepower.

Past/Perfective
Polite
Military