In May 1940, he participated in the Battle of Rotterdam, making an air landing and seizing some of the city's key bridges. Choltitz, the commander of the 3rd Battalion of the 16th Air Landing Regiment, began to organize his troops after landing them at Waalhaven Air Force Base. He sent them to the bridges in Rotterdam. The Dutch had not stationed many soldiers in the southern part of the city. One unit was made up of butchers and bakers and about 90 infantrymen, the latter being reinforced by riflemen who had withdrawn from the airfield. The Dutch troops hid in houses that were on the route to the bridges. There they ambushed the approaching German troops. Both sides suffered casualties. The Germans managed to bring up a PaK anti-tank gun. The Dutch had to yield under the ever-increasing pressure. The German force then moved on to the bridges, quickly followed by the bulk of 9th Company of the 16th Air Landing Regiment.