四国 しこく艦隊 かんたい下関 しものせき砲撃 ほうげき事件 じけんだったら
shikoku kantaishimono sekihōgekijikendattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 四国艦隊下関砲撃事件

1. If it had been the Shimonoseki bombardment incident by the Shikoku fleet.; Had it been the Shimonoseki bombardment incident by the Shikoku fleet.

Tara Conditional