じゅう ねん戦争 せんそうだったら
jūgonen sensōdattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 十五年戦争

1. If the Fifteen Years' War…; If there had been a Fifteen Years' War…; When the Fifteen Years' War… (happened)

Tara Conditional