Austria : WW1
Ahaha, yes Cata, but I would say WW2 also, Hitler used to be Austrian if I am not wrong.
France: for more than one thousand of years of Wars all over Europe, a religious war known as the Crusades mainly instigated by the French (or Frankish depending on the period) thus the destruction of the great Islamic culture (annihilation of cities such as Jerusalem killing the entire population), and the destruction of the Byzantine Empire (during the 4th crusade that sacked Constantinople and mass murdered its inhabitants), genocides in Algeria, Africa and Indochina during the Colonial Wars and the post colonial uprisings, the destruction of the different regional cultures and people that once inhabited the territory in what is nowadays France (Basques, Bretons, Alsatians, Corsicans, Kanaks, Tahitians, and 60 other forgotten people), the French government denies this but it is still going on currently!
Oh and if we go further in History, the Gauls for having sacked Rome under their commander Brennos, and the plunder, savage sacking of Greek cities again by Gaulish tribes (Gauls before the Romans were baddass as much as Germanic folks... fortunately the Romans "civilized" us and we discovered wine!)
Edited 1/9/2016 12:33:14