 Duluth yakabva kuWestpac musi wa1 October 1971. Ngarava yakatakura zvinhu zveBLT 2nd Battalion, 4th Marines kuOkinawa musi wa18 Gumiguru isati yatangazve Da Nang logistics rutsigiro mashandiro kunze kweSubic Bay. LPD yakapa mota, zvishandiso uye zvekubatsira vanhu kuDa Nang uye yakatakura mitoro yepasi uye yakakuvadza PTFs yekudzokera kuSubic. LPD yakaramba iripo kusvikira munguva yechando, ichiita nguva nenguva amphibious kurovedza muPhilippines uye kutakura mauto nekutakura pakati peSubic Bay neBuckner Bay. Pana 1 April, pashure pokutanga kweNorth Vietnamese Easter Offensive, Duluth akaenda kunzvimbo yekubata kunze kweSouth Vietnam kuti amirire zviitiko. Nekurwiswa kweNorth Vietnamese kwakapera pakupera kwemwedzi, iyo LPD yakaenda kuSubic Bay kuzorora uye kuzorora, 821 Chivabvu. Achidzokera kuVietnam, Duluth yakapinda 300 South Vietnamese marines paTan My ndokuvamhanyira muQuảng Trị Province musi wa24, panguva iyo kushanda Duluth kwakagamuchira moto wemuvengi unoputika kubva kumhenderekedzo yegungwa. LPD yakaita basa rakafanana mukutanga kwaJuly, apo maherikoputa eMarines akaendesa maSouth Vietnamese marines panguva yeOperation Lam-Son 72, vasati vaenda kumusha musi wa 14 July ndokusvika muSan Diego musi wa 4 August 1972. 