The Wounded Knee Occupation, also known as Second Wounded Knee, began on February 27, 1973, when approximately 200 Oglala Lakota 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 use impeachment to remove tribal president Richard Wilson, whom they accused of corruption and abuse of opponents. Protesters also criticized the United States government's failure to fulfill treaties with Native American people, and demanded the reopening of treaty negotiations with the goal of fair and equitable treatment of Native Americans.