Landings by the 1st Allied Airborne Army's three divisions began in the Netherlands on 17 September 1944.
Although allocation of aircraft for each division was roughly similar, the U.S. 101st Airborne Division landing at Nijmegen would use only one lift.
The U.S. 82nd Airborne Division at Grave required two lifts while the British 1st Airborne Division at Arnhem would need three lifts.
Whereas the two American divisions delivered at least three quarters of their infantry in their first lift, the 1st Airborne's similar drop used only half its infantry capacity and the remainder to deliver vehicles and artillery.

The 1st Airborne Division had the required airlift capacity to deliver all three parachute brigades with their glider borne anti-tank weapons or two of the parachute brigades and the airlanding brigade on day one.
However, instead the vast majority of the division's vehicles and heavy equipment, plus 1st Parachute Brigade, most of 1st Airlanding Brigade and divisional troops would be on the first lift.
The airlanding brigade would remain at the landing grounds and defend them during the following day's lifts, while the parachute brigade set out alone to capture the bridges and ferry crossing on the River Rhine.


On the second day, 4th Parachute Brigade's lift of ninety-two C-47s (for the paratroops), forty-nine Horsa and nine Hamilcar gliders (for the artillery, vehicles and crews), were scheduled to arrive furthest away from Arnhem on Ginkel Heath drop zone 'Y', as early as possible on Monday 18 September 1944.
 The brigade's objective was to capture the high ground north-west of Arnhem.
In their last briefing before departure, Brigadier Hackett dismissed all officers except for the battalion commanders and the brigade staff and told them;
"They could forget what they had been told.
Being put down where we were, with surprise gone and the opposition alerted, and given the German capability for a swift and violent response to any threat to what really mattered, they could expect their hardest fighting and worst casualties, not in defence of the final perimeter, but in trying to get there."

The division's fourth unit, the 1st Polish Parachute Brigade, were to arrive on day three, dropping their glider troops in the north and their paratroops south of the river.
Once all units were in place, the division was to form a defensive ring around the Arnhem bridges until relieved by the advance of XXX Corps 60 miles (97 km) to the south.
Landings by the 1st Allied Airborne Army's three divisions began in the Netherlands on 17 September 1944. Although allocation of aircraft for each division was roughly similar, the U.S. 101st Airborne Division landing at Nijmegen would use only one lift. The U.S. 82nd Airborne Division at Grave required two lifts while the British 1st Airborne Division at Arnhem would need three lifts. Whereas the two American divisions delivered at least three quarters of their infantry in their first lift, the 1st Airborne's similar drop used only half its infantry capacity and the remainder to deliver vehicles and artillery.
The 1st Airborne Division had the required airlift capacity to deliver all three parachute brigades with their glider borne anti-tank weapons or two of the parachute brigades and the airlanding brigade on day one. However, instead the vast majority of the division's vehicles and heavy equipment, plus 1st Parachute Brigade, most of 1st Airlanding Brigade and divisional troops would be on the first lift. The airlanding brigade would remain at the landing grounds and defend them during the following day's lifts, while the parachute brigade set out alone to capture the bridges and ferry crossing on the River Rhine.

On the second day, 4th Parachute Brigade's lift of ninety-two C-47s (for the paratroops), forty-nine Horsa and nine Hamilcar gliders (for the artillery, vehicles and crews), were scheduled to arrive furthest away from Arnhem on Ginkel Heath drop zone 'Y', as early as possible on Monday 18 September 1944.  The brigade's objective was to capture the high ground north-west of Arnhem. In their last briefing before departure, Brigadier Hackett dismissed all officers except for the battalion commanders and the brigade staff and told them;
"They could forget what they had been told. Being put down where we were, with surprise gone and the opposition alerted, and given the German capability for a swift and violent response to any threat to what really mattered, they could expect their hardest fighting and worst casualties, not in defence of the final perimeter, but in trying to get there."
The division's fourth unit, the 1st Polish Parachute Brigade, were to arrive on day three, dropping their glider troops in the north and their paratroops south of the river. Once all units were in place, the division was to form a defensive ring around the Arnhem bridges until relieved by the advance of XXX Corps 60 miles (97 km) to the south.
4th Parachute Brigade (United Kingdom)