I have been watching a series on Yesterday about those who collaborated with the Germans. Belgian, Dutch and Norwegian have all been covered. Last night it featured the activities of the IRA and their plans to use German help to oust the British from Northern Ireland. 1. Why did the Germans not invade Ireland? Eire would have been very quickly overrun as they had no strong defences, armaments nor forces to repel them. Germany would then be on the Uk's doorstep and have control of the seaports plus an easy hop over for bombing raids. The raids would have covered the whole of UK's wesern coast. 2. Were the IRA collaborators? Eire was neutral so the Germans were not their enemy. There were members in the North and they would be regarded as having betrayed their country. Collaborator - one who cooperates traitorously with an enemy.