After forces in the Serbian province of Kosovo began a fight for independence, Serbian president Slobodan Milosevic carried out an ethnic-cleansing campaign against Kosovo. In an attempt to stop the escalation of war in the Balkans, NATO and US forces bombed Serbia until June 1999. Milosevic then agreed to withdraw troops from Kosovo and recognize the province’s independence.
In World War I, the Allied forces were initially composed of Britain, France, Belgium, Serbia, and Russia, with Japan, Italy, the United States, and fifteen other nations joining the alliance before the war’s end.