In March 1914, the club purchased "De Kull", a decommissioned gravel pit and the grounds on which the later Bökelbergstadion would be built. The First World War halted the progress of both the stadium and football in general, as many players volunteered or were drafted for military service. With rapidly changing player lineups, Borussia contested the war cup (German: "Kriegspokal"), beating Düren 7–0. In total, Borussia played 18 games in the 1914–15 season, in spite of the logistical difficulties caused by the war.