The following information was provided by contributor John Early Andrews, # 47525492:
POLO IN THE UNITED STATES: A History
by Horace A. Leffaye
Page 72
In preparation for the Olympic Competition, a team was selected to travel to England from occupied Germany. After a series of travel matches in Coblenz, Col. John C. Montgomery, Cavalry... were selected to represent the United States. Col. Montgomery as Chief of Staff, was unable to make the journey and was replaced by Lt. Joseph Scranton Tate, from the Cavalry branch.
The team for the Olympic games was Col. Margetts, Back; Col. Montgomery; and Majors Allen and Harris. General Terry Allen went on to command the First Infantry Division during World War II.
In 1912, in Stockholm, Jim Thorpe's banner year, John Carter Montgomery, a 2-goal handicap lieutenant in the 7th Cavalry, took 8th place in the Individual Three-day Event mounted on his horse Deceive. As mentioned previously, John Carter Montgomery, by then a major, took the bronze medal at the 1920 polo competition.2