高級 こうきゅう将校 しょうこうではありませんでした
kōkyū shō kōdewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 高級将校

1. Was not a high-ranking officer.; Was not an officer of high rank.

Past/Perfective
Negative
Polite
Formal Register