独伊 どくい さん こく軍事 ぐんじ同盟 どうめいだったら
hidokuisankoku gunjidōmeidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 日独伊三国軍事同盟

1. if/when Japan, Germany, and Italy were military allies; had Japan, Germany, and Italy been military allies

Tara Conditional