First Encounter, United States Army Versus Confederate States Army

During the withdrawal of the Federal forces from Indian Territory, as ordered by the War Department, Colonel William H. Emory captured on May 5, 1861, by a sudden reverse movement, the advance guard of the pursuing Texan forces under Colonel William C. Young. The Texans were taken without bloodshed, held overnight, and released after a conference; they retraced their steps toward Fort Washita, recently evacuated by the garrison at Fort Cobb before removing all Federal forces to the safety of Fort Leavenworth, Kansas. Available Civil War records point to this encounter as the first between U.S. forces and Confederate troops in Indian Territory.

From Civil War Sites in Oklahoma by Muriel H. Wright and LeRoy H. Fischer