The Weather Underground was a radical leftist organization formed in the late 1960s in the United States. It emerged from the Students for a Democratic Society (SDS) and aimed to promote social change through direct action and protest against the Vietnam War. The group believed in using more militant tactics to achieve its goals, which included racial equality and anti-imperialism. Active primarily during the 1970s, the Weather Underground conducted a series of bombings targeting government buildings and institutions. Their actions were controversial and led to a significant law enforcement response. The group eventually disbanded in the late 1970s, with many members later seeking to distance themselves from their past activities.