Returning to the War Department in 1945, he served as a strategic planner, and later became executive officer to the Under Secretary of the Army.

After graduating from the National War College in 1950, Porter held a variety of positions to include commander, 2nd Armored Cavalry Regiment; Deputy G-3, Allied Land Forces Central Europe; Chief of Staff, X Corps; member of the National Security Council Planning Board; Commander, 3rd Armored Division; United States Representative to the Permanent Deputies Group, Central Treaty Organization.

From April 1964 to 1965 he commanded the First United States Army at Fort Jay, Governors Island, New York.

[2] He died on 22 April 2000, at the Martha Jefferson Hospital in Charlottesville, Virginia, after a heart attack.

This biographical article related to World War II United States Army personnel is a stub.