Some members of the WUO joined the May 19th Communist Organization and continued their activities until that group disbanded in 1985. The WUO began to disintegrate after the United States reached a peace accord in Vietnam in 1973, and it was defunct by 1977. The WUO announced that its Janubombing of the United States Department of State building was 'in response to the escalation in Vietnam'. The WUO asserted that its bombing of the Pentagon was 'in retaliation for the U.S. The WUO communiqué issued in connection with the bombing of the United States Capitol on March 1, 1971, indicated that it was 'in protest of the U.S. Three members of the group were killed in an accidental Greenwich Village townhouse explosion, but none were killed in any of the bombings. Some attacks were preceded by evacuation warnings, along with threats identifying the particular matter that the attack was intended to protest. In the 1970s, the WUO conducted a bombing campaign targeting government buildings and several banks. In 1970, the group issued a 'Declaration of a State of War' against the United States government under the name 'Weather Underground Organization'. The ' Days of Rage' was the WUO's first riot in October 1969 in Chicago, timed to coincide with the trial of the Chicago Seven. The WUO took part in domestic attacks such as the jailbreak of Timothy Leary in 1970. The FBI described the WUO as a domestic terrorist group, with revolutionary positions characterized by Black Power and opposition to the Vietnam War.

Officially known as the Weather Underground Organization ( WUO) beginning in 1970, the group's express political goal was to create a revolutionary party to overthrow the United States government, which WUO believed to be imperialist. Originally known as the Weathermen, the group was organized as a faction of Students for a Democratic Society (SDS) national leadership. The Weather Underground was a far-left militant organization first active in 1969, founded on the Ann Arbor campus of the University of Michigan.

Weather underground history