Yeats is obviously writing in the context of an Irish civil war, but it's also the case that he's writing in the shadow of the First World War as well.

叶芝显然是在爱尔兰国内战争时期进行创作的，但是同时他也是在,一战的阴影下写的。

耶鲁公开课 - 现代诗歌课程节选