興亡 こうぼう盛衰 せいすいではありませんでした
kōbōseisuidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 興亡盛衰

1. Was not prosperity and decline.; Was not flourishing and waning.

Past/Perfective
Negative
Polite
Formal Register