直到战争结束,他才回到祖国(强调句 It is that)

It is at the end of the war that he came back to his motherland.
(It is...that... 是强调句，it is 后面的是所要强调的部分，强调句的一个特征是去掉It is和that之后，剩下的部分仍然可以作为一个句子，而上面那些，be动词后面没有介词短语，而直接是名词，就不符合强调句的要求)

It is not until the war ended that he was back to his motherland.

小哨哨用until就要用it is not了

It is the end of the war that he was back to his motherland.

It is that the end of the war he returned his monther's land.

It is not until the war ended that he returned to his homeland.