戦闘 せんとう前哨 ぜんしょうではありませんでした
sen tōzen shōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 戦闘前哨

1. Was not a forward combat outpost.; Was not a front line outpost.

Past/Perfective
Negative
Polite
Formal Register