陸軍 りくぐん幼年 ようねん学校 がっこうだったら
rikugun'yōnen gakkōdattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 陸軍幼年学校

1. If it were the Army Junior School; If it had been the Army Junior School; When it was the Army Junior School

Tara Conditional