A 71-day standoff between federal authorities and the American Indian Movement members occupying the Pine Ridge Reservation at Wounded Knee, South Dakota ends with the surrender of the militants.

The Wounded Knee Occupation, also known as Second Wounded Knee, began on February 27, 1973, when approximately 200 Oglala Lakota (sometimes referred to as Oglala Sioux) and followers of the American Indian Movement (AIM) seized and occupied the town of Wounded Knee, South Dakota, United States, on the Pine Ridge Indian Reservation. The protest followed the failure of an effort of the Oglala Sioux Civil Rights Organization (OSCRO) to impeach tribal president Richard Wilson, whom they accused of corruption and abuse of opponents. Additionally, protesters criticized the United States government's failure to fulfill treaties with Native American people and demanded the reopening of treaty negotiations to hopefully arrive at fair and equitable treatment of Native Americans.

Oglala and AIM activists controlled the town for 71 days while the United States Marshals Service, FBI agents, and other law enforcement agencies cordoned off the area. The activists chose the site of the 1890 Wounded Knee Massacre for its symbolic value. In March, a U.S. Marshal was shot by gunfire coming from the town, which ultimately resulted in paralysis. A member of the Cherokee tribe and a member of the Oglala were both killed by shootings in April 1973. Ray Robinson, a civil rights activist who joined the protesters, disappeared during the events and is believed to have been murdered. Due to damage to the houses, the small community was not reoccupied until the 1990s.

The occupation attracted wide media coverage, especially after the press accompanied the two U.S. senators from South Dakota to Wounded Knee. The events electrified Native Americans, and many Native American supporters traveled to Wounded Knee to join the protest. At the time there was widespread public sympathy for the goals of the occupation, as Americans were becoming more aware of longstanding issues of injustice related to Natives. Afterward AIM leaders Dennis Banks and Russell Means were indicted on charges related to the events, but their 1974 case was dismissed by the federal court for prosecutorial misconduct, a decision upheld on appeal.

Wilson stayed in office and in 1974 was re-elected amid charges of intimidation, voter fraud, and other abuses. The rate of violence climbed on the reservation as conflict opened between political factions in the following three years; residents accused Wilson's private militia, Guardians of the Oglala Nation (GOONs), of much of it. More than 60 opponents of the tribal government died violently during those years, including Pedro Bissonette, director of the Oglala Sioux Civil Rights Organization (OSCRO).