"The Heavy Water War" refers to the conflict during World War II over the production of heavy water, a crucial component for nuclear weapons development. The primary site for heavy water production was the Norwegian plant at Vemork, which was targeted by the Allies to prevent the Nazi regime from advancing its atomic bomb program. The war involved several daring operations, including sabotage missions by Norwegian resistance fighters and British commandos. These efforts aimed to disrupt the heavy water supply and ultimately thwart the Nazi ambitions for nuclear capabilities, significantly impacting the course of the war and the future of nuclear energy.