Yugoslavia had been a multicultural nation for most of the 20th century, with citizens of many ethnicities and cultures. Later in the 20th century ethnic tension started rising between the ethnically Serbian orthodox Christians, the ethnically Croatian Catholics and the ethnically Bosnian Suuni Muslims. This came to a head in 1991 when Croatia demanded independence, this quickly escalated into violence between the Serbs and the Croats. Similar wars kicked off in Bosnia, Macedonia, Slovenia and Kosovo. These wars were categorized by their tendancy for the armies to Genocide and ethnically cleanse civilians who did not belong to their own group.