"Heavy water sabotage" refers to a series of operations during World War II aimed at disrupting the production of heavy water, a crucial component for nuclear reactors and atomic bomb development. The most notable efforts occurred in Norway, where the German military sought to harness heavy water for their nuclear program. The sabotage missions, carried out by Allied forces, included attacks on the Vemork plant, which was the primary producer of heavy water. These operations successfully hindered the German nuclear efforts, demonstrating the strategic importance of disrupting enemy resources in wartime.