two 前面加定冠詞嗎|world war

前面不加定冠詞，例如：

1、In World War two， the Americans fought with the Britain and French against the germans.二戰中美國聯合英、法兩國對德作戰。

2、World War Two was worse than World War one.二戰比一戰更殘酷。

3、Torpedo boats played an important role during World War Two.魚雷艇在第二次世界大戰中發揮了重要作用。