Mgbe emezigharị na ọzụzụ na Pearl Harbor, "Colahan" gara na 31 Mee 1944 iji sonye na 5th Fleet, na-arụ ọrụ na radar picket, shore bombardment na ọrụ nkwado ọkụ n'oge bọmbụ, njide, na ọrụ nke Guam site na July 12 ruo August 15 ma na-enyocha mwakpo ikuku na nkwado nke mbuso agha nke ndịda Palaus site na August 29 ruo September 28. "Colahan" gosipụtara Fast Carrier Task Force (mgbe ahụ 3rd Fleet's TF 38, mgbe e mesịrị 5th Fleet's TF 58) ka ọ na-akwadebe maka mwakpo Leyte
site na mwakpo ikuku na Nansei Shoto na Formosa site na 10 ruo 14 Ọktọba, wee malite mwakpo na Philippines ruo Ọktọba 20, ụbọchị nke ọdịda. Carriers ọ na-eche nche kụrụ ndị agha Japan na-ala ezumike nká mgbe Agha nke Surigao Strait nke nnukwu Agha maka Leyte Gulf nke 24-26 Ọktọba. Ọrụ ụgbọelu na-aga n'ihu na Philippines chọrọ ọrụ ya ruo mgbe ọ tinyere na Ulithi maka mmezi na ngwụsị Disemba mgbe ọ na-agbapụ "Halsey's Typhoon".