1865 Three Cheyenne or Sioux warriors attempted to drive off the horses at Sweetwater Station, Wyoming. One of them was killed in the process.
1869 John Wesley Powell's expedition left Green River. Attribution: On This Day.
1904 President Roosevelt made the following statement in his commencement address at Groton: "It shall profit us nothing if our people are decent and ineffective. It shall profit us nothing if they are efficient and wicked. In every walk of life, in business, politics; if the need comes, in war; in literature, science, art, in everything, what we need is a sufficient number of men who can work well and who will work with a high ideal."
1918 A Red Cross parade in Laramie drew thousands of observers and businesses were closed between 10 and 1. Attribution: On This Day.
1944 The University of Wyoming announces it will offer a woman's aviation program. Attribution: Wyoming State Historical Society.
1968 Chief, the last U.S. Army Remount to have served in the U.S. Cavalry (as far as is known), died.
2003 UXU Ranch outside in Park County added to the National Registry of Historic Places.