AdvertisementAmid Keystone XL Fight, The Lakota Treaty Of Fort Laramie Turns 150April 29, 2018Jim KentfacebookEmailA 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)