He attended the local public schools Kansas City and subsequently entered the United States Naval Academy in Annapolis, Maryland.

Train graduated from the academy on June 4, 1909, with the rank of passed midshipman and was assigned to the armored cruiser USS West Virginia.

For his conduct during the attack, Train was awarded the Navy Commendation Medal with Combat "V" from the commander of the Pacific Fleet, Admiral Chester W. Nimitz.

His next assignment was capacity of Director of the Office of Naval Intelligence, in which he replaced Rear Admiral Theodore S. Wilkinson on July 20, 1942.

In this capacity, he replaced Rear Admiral Clifford E. Van Hook and was responsible for the securing of the Panama Canal besides his other duties.

After the Japanese surrender, Train remained on active duty as senior naval member of the Joint Post-War Committee until his retirement.