I once visited a place called Hill 60, near Hooge, a few miles from Ypres, where there was very heavy fighting in WW1, particularly around time of thje battles of Loos and Neuve Chappelle in 1915.
In WW2 the same patch of ground - its not much bigger than a tennis court -was fought over again. Additionally, among the memorials to the major battles, there is one to a couple of Resistance fighters killed in a skirmish with the Germans in WW2
Battle of Hill 60 (Western Front) - Wikipedia, the free encyclopedia