Massachusetts Sen. Elizabeth Warren proposed legislation Wednesday to revoke the Medal of Honor from soldiers who took part in the Wounded Knee massacre in 1890.

Warren and Democratic Oregon Sen. Jeff Merkley said they would introduce the Senate companion to the Remove the Stain Act, which was introduced in the House by Reps. Denny Heck of Washington, Deb Haaland of New Mexico, and Paul Cook of California.

Sens. Kamala Harris of California, Ron Wyden of Oregon, Patrick Leahy of Vermont, and Bernie Sanders of Vermont are original co-sponsors of the bill.

Twenty Army soldiers received the highest military decoration after the Army killed hundreds of Lakota men, women, and children on the Pine Ridge Reservation in South Dakota on Dec. 29, 1890.

“The horrifying acts of violence against hundreds of Lakota men, women, and children at Wounded Knee should be condemned, not celebrated with Medals of Honor,” said Warren, who is running for president.

Congress passed a resolution in 1990 expressing the U.S. government’s ″deep regret″ for the event.

[Opinion: The Warren free fall is real]