Allied bombing of Yugoslavia in World War II

The Allied bombing of Yugoslavia in World War II involved air attacks on cities and towns in the Kingdom of Yugoslavia by the United States Army Air Force (USAAF) and Royal Air Force (RAF), including the Balkan Air Force (BAF), during the Axis occupation of that country between 1941 and 1945. Dozens of Yugoslav cities and towns were bombed, many repeatedly. These attacks included intensive air support for Yugoslav Partisan operations in May-June 1944, and a bombing campaign against transport infrastructure in September 1944 as the German Wehrmacht withdrew from the Balkans. This latter operation was known as Operation Ratweek. Some of the attacks caused significant civilian casualties.

Belgrade
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. 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.