At Atoka, also known as Rector’s Crossroads, on June 10, 1863, Company “A” of the 43rd Battalion of Partisan Rangers, known as Mosby’s Rangers, was formally organized. James William Foster was elected captain, Thomas Turner first lieutenant, W. L. Hunter second lieutenant, and G. H. Whitescarver third lieutenant. Shortly afterward, Brawner’s Company of Prince William Cavalry joined the command.