At the FK Borac stadium near the Morava River in Čačak, gendarmes, under the supervision of German soldiers, executed 12 patriots on June 20, 1941. This was the first execution in Čačak after the occupation.

　　On June 20, 1941, military police shot and killed 12 Serb nationalists under the watchful eye of German soldiers at the Boratu stadium near the Morava River in Čačak. This was the first shooting incident after the German occupation of Čačak.

　　　On April 6, 1941, Axis forces invaded Yugoslavia and bombed Belgrade and other cities for three days, killing 17,000 people. Belgrade, the capital of Serbia, was occupied by the Germans on April 13, 1941; on July 7, 1941, Chetnik forces staged a massive uprising against the Germans in the area between Šabac and Užice in Serbia. In the Krupani region of northwestern Serbia, armed resistance broke out in German-occupied Yugoslavia beginning on July 7, 1941.

　　It was the first of many “free territories” and was called the “Republic of Uzice.” Almost immediately, the Germans suppressed the uprising Chetnik nationalists. German units in the region began to put down the more serious and rapidly expanding uprising by August 27.

　　On September 16, 1941, the Germans applied a Europe-wide order to kill 50 to 100 enemy hostages for every one German soldier killed. They repressed most in Serbia, ordering the execution of 100 Serbian hostages for each German killed. The Germans waged war on the entire Serbian population, regarding Serbian citizens as the enemy, as acts of insurgency were the origin of communism. The Germans declared Serbia a war zone and villages began to be set on fire. After 10 German soldiers were killed in a joint attack by partisans and Chetniks, the Germans shot 1,700 Serbian hostages on October 20. In the following weeks, thousands more Serbian hostages were executed in retaliation for the Serb rebel attacks.