だい日本 にっぽん帝国 ていこく陸軍 りくぐんではありませんでした
dainipponteikokuri kugundewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 大日本帝国陸軍

1. Was not of the Great Japanese Imperial Army.; Was not a member of the Great Japanese Imperial Army.

Past/Perfective
Negative
Polite
Formal Register