sentences:  Out of those 52,000 men, 22,500 were allocated to the landing at Aitape.Overall command of the Allied operation to secure Hollandia and Aitape was given to Lieutenant General Walter Krueger, commander of the Sixth United States Army, codenamed Alamo Force.Japanese troops around Aitape and Tadji Airstrip were thought to number about 3,500, including 1,500 combat troops of Shigeru Katagiri's 20th Division.