Kammala jumla mai zuwa: Bayan shakedown "Killen" ya share Port Angeles, Wash. a ranar 19 ga Agusta, 1944, ya raka wani jirgi daga Pearl Harbor kuma ya isa Manus, Admiralty Islands a ranar 14 ga Satumba. Bayan gudanar da atisayen horarwa, jirgin ya bar Hollandia a ranar 12 ga Oktoba tare da Rundunar Sojojin Tsakiya ta Tsakiya da ta isa San Pedro Bay a ranar 20. A cikin kwanaki 5 masu zuwa ta ba da rana da dare goyon bayan wuta ga sojojin da ke bakin teku
a kan Leyte, kuma a cikin wani lokaci na minti 30 a ranar 21 ya yi shiru uku makiyan artillery matsayi. Lokacin da sojojin ruwan Japan suka yanke shawarar kalubalantar saukar jiragen ruwa a yakin Leyte Gulf, rundunar "Killen" ta yi karo da abokan gaba a Surigao Strait. A safiyar ranar 25 ga Oktoba, da karfe 03:25, ta kaddamar da torpedoes biyar a kan jirgin yakin "Yamashiro". Ɗaya daga cikin hits, yana jinkirta ta zuwa, ya ba da damar sauran masu hallaka Amurka suyi aiki don kashewa. A cikin manyan jiragen ruwa na Leyte, da ke rufe daruruwan dubban nautical miles, Amurka ta rage jiragen ruwa na Japan zuwa wani karfi mai karfi wanda ya sa ya kara hanzarta ci gaba zuwa Japan da kuma karshen yakin.