 Harrison akazotungamira 12th Defense battalion panguva yeHondo yeCape Gloucester kuNew Guinea pakupera kwaZvita 1944 kusvika akatsiviwa naMerlyn D. Holmes uye akagadzwa mukuru mukuru we11th Marine Artillery Regiment mukati me1st Marine Division pasi peMajor General William H. Rupertus. Regiment yake yakasarudzwa seboka revarwi vePeleliu Operationmuna September 1944 uye kunyange zvazvo akanga asina motokari dzokufambisa, Harrison akaronga kupfura kwezvombo zvehondo pauto romuvengi rakanga rakadzika midzi. Zviito zvake zvakaparadza nhamba huru yezvikamu zveJapan, uye ikoku kwakabetsera kukunda nhimbe yacho. Nokuda kwezviito zvake uye hutungamiri panguva yehondo, Harrison akagamuchira Legion of Merit neCombat V uyewo Navy Presidential Unit Citation. 