Western Allied invasion of Germany and Operation Undertone, occurred during which event?
Operation Undertone Operation Undertone was a large assault by the U.S. Seventh and French 1st Armies of the U.S. Sixth Army Group as part of the Allied invasion of Germany in March 1945 during World War II.
Battle of Belgium The Battle of Belgium or Belgian Campaign, often referred to within Belgium as the 18 Days' Campaign (French: "Campagne des 18 jours" , Dutch: "Achttiendaagse Veldtocht" ), formed part of the greater Battle of France, an offensive campaign by Germany during the Second World War. It took place over 18 days in May 1940 and ended with the German occupation of Belgium following the surrender of the Belgian Army.