In the days that followed, she conducted landing craft exercises; and, on the 22nd, she arrived at Oakland to load cargo for the assault on Japanese-occupied islands in the Aleutian chain. On 5 August, she commenced exercises at Adak and on the 15th anchored off Quisling Cove, Kiska, to take part in what was expected to be an assault on a Japanese stronghold. However, the landing turned out to be unopposed. "Thuban" remained in the Aleutians until late in the month while American forces reoccupied the islands. She then steamed south, touched at San Francisco, and arrived at San Diego on 6 September.