日中 にっちゅう全面 ぜんめん戦争 せんそうだったら
nicchū zemmensensōdattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 日中全面戦争

1. If/when Japan and China were in total war.; If there had been a full-scale war between Japan and China.

Tara Conditional