"Unconditional Surrender" refers to a military strategy where one party agrees to surrender without any conditions or negotiations. This means that the surrendering side accepts defeat and relinquishes control without any demands or terms. The concept was notably used during World War II, particularly by the Allies against the Axis powers. The term gained prominence when U.S. President Franklin D. Roosevelt declared it as a goal for the Allies in 1943. This approach aimed to ensure total victory and prevent any possibility of the defeated powers negotiating a favorable outcome. It ultimately contributed to the end of the war in Europe.