On 31 December 1943, Eisenhower and Montgomery first saw the plan, which proposed amphibious landings by three divisions and two-thirds of an airborne division. The two generals immediately insisted that the scale of the initial invasion be expanded to five divisions, with airborne descents by three divisions, to allow operations on a wider front. The change doubled the frontage of the invasion from to . This would allow for quicker offloading of men and materiel, make it more difficult for the Germans to respond, and speed up the capture of the port at Cherbourg. The need to acquire or produce extra landing craft and troop carrier aircraft for the expanded operation meant that the invasion had to be delayed to June.