主戦 しゅせん闘戦 とうせん しゃじゃなかったです
shu sentō senshajanakattadesu

Noun
Desu Copula

The polite, past negative form of 主戦闘戦車

1. Was not a main battle tank.; Wasn't a main battle tank.

Past/Perfective
Negative
Polite
Casual Register