Support WBURAmid Keystone XL Fight, The Lakota Treaty Of Fort Laramie Turns 150Play02:25Download AudioJim KentApril 29, 2018 ShareA wooden cross marks an unidentified U.S. Army grave at Fort Laramie, Wyo., as pictured in 2009. The Fort Laramie National Historic Site will host a gathering of Lakota people this weekend to commemorate an 1868 treaty with the U.S. government. (AP)