The Germans systematically murdered a total of 689 political prisoners from Maribor and surrounding areas as a retaliatory measure in response to Partisan activity.
Those that were shot had been arrested for supplying the Partisan forces with food, weapons, and other aid.
In 1941 Nazi Germany attacked and defeated Yugoslavia, quickly establishing an occupation system.
Maribor together with Slovenian Styria was annexed to Nazi Germany and a brutal process of Germanisation began.
The worst single massacre occurred on 2 October 1942, when the Germans murdered 143 Slovenian civilians.