Source data found1. Laffin, J. Diccionario de Batallas, 2001: (Attu (ofensiva aliada (americana), 1943 en el Pacífico norte)
2. WWW BNE aut., 26/11/2019 Batalla de Attu, 1943
3. WWW Wikipedia, 02-07-2024 [The Battle of Attu (codenamed Operation Landcrab), which took place on 11-30 May 1943, was fought between forces of the United States, aided by Canadian reconnaissance and fighter-bomber support, and Japan on Attu Island off the coast of the Territory of Alaska as part of the Aleutian Islands campaign during the American Theater and the Pacific Theater]