He remained in that capacity until the end of month and subsequently assumed duty as Operations officer of 1st Marine Regiment under Colonel Arthur T. Mason.

[2] The existence of the Marine Corps as the independent service was in question in 1945–1947, because newly appointed President Harry S. Truman intended the reorganize the United States Armed Forces.

Platt later earned master's degree in psychology at Ohio State University during summer 1949 and subsequently was appointed instructor of infantry tactics and instructional techniques at the Marine Corps Schools, Quantico.

Under constant enemy artillery and mortar fire and with no contact with front units, Platt and his battalion had keep their sector and drove all Chinese troops back to their lines.

[10][11] Platt then briefly served at the Headquarters Marine Corps in Washington, D.C., before joined U.S. Joint Staff in London, United Kingdom.

Platt was transferred to the Divisional staff in July 1962 and assumed duty as operations officer under Major General Ormond R. Simpson.

In this capacity, he served as deputy under his old friend from Korea, major general Lewis W. Walt and also held additional duty as Chu Lai Base coordinator.

Platt shared this responsibility with brigadier general Melvin D. Henderson, who was also named commander of Task Force Delta for forthcoming Operation Harvest Moon in Quế Sơn Valley.

Task Force Delta was ambushed by VC guerillas near the village of Ky Phu on December 18 and after two days of heavy fighting, the operation was declared successful.

[13] Although the operation was declared over, commander of III Marine Amphibious Force, General Walt had received intelligence reports that the VC 1st Regiment was entering the Que Son Valley.

For the next 10 days, the Marines swept through numerous villages, cleared out isolated guerrilla bands, and uncovered enemy supplies, but found no major VC units.

The Marines also captured or destroyed caches including 28 tons of rice, 500 pounds of sweet potatoes, 53 weapons, and 450 rounds of ammunition.

[13][14] Following the Operation Double Eagle, which brought inconclusive results, Platt had received intelligence report that PAVN 21st Regiment moved into a region seven miles northwest of Quang Ngai City.

Following the planning in cooperation with generals English and McCutcheon, Platt launched the Operation Utah on March 4, 1966, and ordered airstrikes on the landing zone at Chau Nhai.

[13] This act caused an immediate shock wave throughout I Corps area on the announcement of his removal, approximately 2,000 persons, including ARVN soldiers, marched through the streets of Da Nang and Huế in protest and a general strike was launched.

They hastily boarded the U.S. Army helicopter waiting for them and as the aircraft lifted off, a rebel ARVN lieutenant fired two pistol shots at it at point blank range.

After the second shot, the U.S. Army helicopter gunner fired a six-round burst killing the rebel ARVN lieutenant and wounding two other Vietnamese soldiers.

The rebel forces immediately made the dead lieutenant a "martyr" to their cause and accused the Americans of blatant interference in South Vietnamese internal affairs.

[13] Platt remained in Vietnam until the beginning of December 1966, when he was succeeded by brigadier general Hugh M. Elwood and ordered back to the United States.

[10][13] Following his tour of duty in Vietnam, Platt was ordered to Washington, D.C., and attached to the Headquarters Marine Corps as deputy assistant chief of staff, G-1 (Personnel).

While in this capacity, he was promoted to the rank of major general on March 19, 1968, and received Navy Distinguished Service Medal for his administrative skills.

He served in this capacity until June 30, 1970, when he was succeeded by Major General Edwin B. Wheeler and retired from the Marine Corps after 30 years of active duty.

[2][10] Shortly after his retirement from the Marine Corps, Platt was offered the position in the Office of Assistant Secretary of Defense for Manpower and Reserve Affairs, where he served as a personnel management director until 1977.

[3] He was also active in the Marine Corps Historical Foundation, where he received a Certificate of Appreciation by then-Commandant Robert H. Barrow for his contributions to the Oral History Program.

Platt returned to Vermont in 1984 and died of heart and lung ailments July 28, 2000 at the Falcons Landing retirement community's nursing home in Sterling, Virginia, where he lived last three months of his life.