 While strategically obsolete, of note is that fortress remained in use by A-H forces in WWI and it stationed a strong Croatian Ustasha and German Wehrmacht unit in WWII.This unit remained firmly entrenched on the fortress throughout the entire war.Members of German forces built additional impromptu bunkers surrounded by concertina wire in the early summer of 1941, and due to its location and firepower, Serbian villagers were unable to take this object during their uprising on August 23, 1941 while they successfully captured all other objects and installations throughout the city and completely destroyed remaining barricaded German/Ustasha units in Doboj and surrounding area.