Following the Nazi invasion of Yugoslavia, the city came under direct Nazi occupation. After a joint Partisan-Chetnik attack on German forces in nearby Gornji Milanovac, "Generalfeldmarschall" Wilhelm Keitel calculated that 50 people were to be shot for every German soldier wounded and 100 people were to be shot for every German soldier killed. Franz Böhme therefore ordered the deaths of nearly 2,800 men and boys between 19 and 21 October 1941 in the Kragujevac massacre. The dead included a class from the city's First Gymnasium; today, a monument to the executed pupils is the symbol of the city. The massacre inspired a poem titled "Krvava Bajka" ("A Bloody Fairy Tale") by Desanka Maksimović.