無敵 むてき艦隊 かんたいじゃありませんでした
mutekikantaijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 無敵艦隊

1. Was not the invincible fleet.; Wasn't the invincible fleet.

Past/Perfective
Negative
Polite
Terminal Form