The crisis over the increasing European-American presence on the northern Great Plains caused growing dissension among the various Lakota bands as they debated what to do. The Wakpokinyan appear to have split, with part of the band (including Touch the Clouds) going into the Cheyenne River Agency on the Missouri River. A portion led by Lame Deer chose to remain out. Lone Horn struggled to maintain dialogue between the various factions of Minneconjou and their relatives, part of his long record as a Lakota diplomat. After Lone Horn died in 1875, the mantle of leadership fell to his son, just as the US Army was beginning its campaign against the non-treaty Cheyenne and Lakota bands.