21st Army Group

The 21st Army Group was a large military formation used by the Allies during World War II, mainly responsible for fighting in Western Europe after D-Day. Led by British General Bernard Montgomery, it included both British and American armies working together. Its main tasks were to invade occupied Europe, push back German forces, and advance into Germany. The group coordinated multiple armies and was crucial in achieving the Allied victory in Western Europe. Essentially, it was a major combined military force that orchestrated key battles and strategic advances during the final years of the war.