The geographical, engineering and logistical difficulties of conducting operations in SWPA were driven home by Alamo Force's first operation, Operation Chronicle, the occupation of Woodlark and Kiriwina Islands in June 1943. Despite the fact that the operation was unopposed by the Japanese, it was subject to delays. Krueger visited Kiriwina, where road work and airbase development were held up by heavy rains, on 11 July.