What was the code name given to the U.S. and British invasion of Holland in September 1944?

The code name for the allied invasion of Holland was Market-Garden. Market referred to the airborne troops, Garden was the land-based attack from the Belgium border. Conceived by British Field Marshal Bernard Law Montgomery, the invasion involved landing British and American airborne troops to capture key Nazi-held bridges in three different towns - Eindhoven, Nijmegen, and Arnhem. The bridge at Arnhem was the prize: a direct route into Germany. Meanwhile, a large force of British armored infantry supported by tanks, artillery and air power, would move up a narrow highway, linking up with each airborne force. As American author Cornelius Ryan pointed out in his celebrated book about the battle, the plan involved going "a bridge too far." As the crow flies, it was only sixty miles to Arnhem, but German resistance turned out to be a lot stronger than allied intelligence had estimated - in fact, two elite German SS panzer divisions were refitting in Arnhem at that time and the allied troops, particularly the lightly armed paratroopers ran right into them. The British First Airborne Division valiantly tried to hang on to the Arnhem bridge, but they were eventually overrun. It would take another six months before the allies were to win a significant victory in Holland.