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. Production of landing craft was ramped up in late 1943 and continued into early 1944, and existing craft were relocated from other theaters. More than 600 Douglas C-47 Skytrain transport aircraft and their crews took a circuitous route to England in early 1944 from Baer Field, Indiana, bringing the number of available troop carrier planes to over a thousand.