Yep,but in my case only one side invaded and these are Germans. My city was also bombed and devastated by allied forces, twice in 1945 , with more firepower then Germans did in 1941. Let me paste you something from Wikipedia:
"Belgrade was bombed by British and American air forces on April 16 and 17, 1944, which was Orthodox Easter Day. The most important unit that took part was American 15th Air Force, based in Foggia in the south of Italy. This carpet bombing raid was executed by 600 bombers flying at high altitude. Civilian casualties were as many as 1,160, while German military losses were 18.[1][2] Belgrade was bombed again on 6 and 8 September 1944 with about 120 flying fortresses from U.S. 15th Air Force, which were accompanied by fighter planes. One unexploded bomb had a written 'Happy Easter' which amazed citizens of Belgrade. [3]"
And, yes we were on their side, against Nazis ,even saved 500 american airmen :
https://youtube.com/watch?v=Y5CXope9ncI but got that shit. Maybe for you wars are far away but again in 1999 bombings again started and German airforce was first time deployed after WW2,so it Europe is not so calm as you thing, maybe info are just too far from you. In this moment,we have tons of muslim terrorists on european soil, waiting mostly in Bosnia, parts of Serbia and Kosovo, many of them going currently in Syria to fight against Al Assad on Al Quaeda side. THis is far away from peace,it is just matter of time. BTW, where are you from?