
Originally Posted by
Inverarity
Well, I imagine most big cities have at least a few wizards living in them. When an invading army attacks the city, even wizards are going to be endangered. Likewise, when a city comes under massive bombardment (such as London, Tokyo, and Dresden during WWII), the wizards are going to notice.
Whether they actively intervened in the war is another matter. On a large scale, probably not, as that would have been noticed. But I doubt every single wizard (especially the Muggle-borns) remained completely removed from the fighting.