After liberating Antwerp and Brussels, Belgium, the Allies planned a very ambitious operation to capture the bridges over the Rhine. The hope was this would allow them to finish the war by Christmas.
The plan made the largest use of paratroops by the Allies during the war and entailed the seizing of key bridges over the Maas and Rhine Rivers. A number of bridges were captured but a key to the plan was the British 1st Airborne Divisions capture of the Arnhem Bridge. They were to hold the bridge until advancing ground forces could reinforce them. They encountered greater then expected opposition and the ground forces were delayed. The attackers were overrun by September 1st.