Ireland has been mass-producing military units since the last time we saw them. You can’t have that many without planning to use them somewhere. Trade relations with Iceland mean they’re probably not a target. Norway is pretty imposing right now, and would get them on the mainland. But there’s England, such a juicy and under-militarized victim to the south, wiping out Germany’s navy. The fact that Elizabeth felt the need to send two melee units to take care of Hitler’s only ship is amusing.
Of note: We get a clear view of The Pyramids of Dublin.