The Spring Creek raid, also known as the Ten Sleep Murders or the Ten Sleep Raid, occurred in 1909 and was the last and deadliest Sheep War conflict in the State of Wyoming’s history.
On the night of April 2, sheepherder Joseph Allemand and four of his associates were encamped along Spring Creek, near the town of Ten Sleep, Wyoming when a group of seven masked cattlemen attacked the sheepmen and murdered Joe Allemand, Joe Emge and Jules (Joe) Lazier.