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So if for some resone the 1914 home rule bill whent into effect during the July crisis.
Both the unionist and the nationalist had armd malitas (ironically mostly German arms for both sides) and large parts of the British army did not want to force home rule on Ulster. So would the UK be willing to join a general European war if the unionist and nationalists are fighting each other in Ireland, seems to me at least the UK would be more woread about a civil war in Ireland then Belgium. And how would that effect the war if Germany didn't have to face the BEF in Flanders of the RN in the north sea.