Devers's first posting was the 1st Battalion, 4th Mountain Artillery, based at Vancouver Barracks, Washington. That was a pack artillery unit, with its howitzers, ammunition, and equipment carried by mules. It was equipped with the obsolescent QF 2.95-inch mountain gun. Three months after Devers joined, the unit moved to Fort David A. Russell, Wyoming, where it rejoined the 2nd Battalion, which was returning from the Philippines. Devers was assigned to Battery C. Soon afterwards, First Lieutenant Lesley J. McNair became the battery commander. On 11 October 1911, Devers married Georgie Hayes Lyon of Arlington, Virginia, daughter of Frank Lyon and niece of Major LeRoy S. Lyon, his battalion commander, in a ceremony at her parents' home in Arlington, Virginia. They had met when she visited her uncle at Fort Russell.
