I saw this story as a link on Metafilter. It's known as the final battle of WWII in Europe (which I'm sure you could argue with), but it sounds like a pretty great inspiration for a map: divided groups of partisan Georgians, assisted by the Dutch locals and supported later by a Canadian force, attacking a heavily fortified island, part of the Atlantic Wall.
http://www.militaryphotos.net/forums/showthread.php?t=97288
http://www.militaryphotos.net/forums/showthread.php?t=97288