Finally, in September, there was Operation Comet, in which the division's three brigades were to land in the Netherlands and each capture a river crossing. The first of these was the bridge over the River Waal at Nijmegen, the second the bridge over the River Maas at Grave, and the last was the bridge over the River Rhine at Arnhem. Planning for "Comet" was well advanced when on 10 September the mission was cancelled. Instead, a new operation was proposed with the same objectives as "Comet" but to be carried out by three divisions of the First Allied Airborne Army.