Water boarding was designated as illegal by U.S. generals in the Vietnam War. On January 21, 1968, The Washington Post published a controversial photograph of an American soldier supervising the waterboarding of a North Vietnamese POW near Da Nang. The article described the practice as "fairly common." The photograph led to the soldier being court-martialled by a U.S. military court within one month of its publication, and he was thrown out of the army. Another waterboarding photograph of the same scene is also exhibited in the War Remnants Museum at Ho Chi Minh City.
In 1947, the United States prosecuted a Japanese military officer, Yukio Asano, for carrying out a form of waterboarding on a U.S. civilian during World War II. Yukio Asano received a sentence of 15 years of hard labor. The charges of Violation of the Laws and Customs of War against Asano also included "beating using hands, fists, club; kicking; burning using cigarettes; strapping on a stretcher head downward."
In its 2005 Country Reports on Human Rights Practices, the U.S. Department of State formally recognized "submersion of the head in water" as torture in its examination of Tunisia's poor human rights record, and critics of waterboarding draw parallels between the two techniques, citing the similar usage of water on the subject.