Platt, Jonas Mansfield, MGen

Deceased
 
 Service Photo 
 Service Details
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Last Rank
Major General
Primary Unit
1968-1970, Headquarters Marine Corps (HQMC)
Service Years
1940 - 1970
Officer Collar Insignia
Major General

 Last Photo 
 Personal Details 

8 kb


Home State
New York
New York
Year of Birth
1919
 
This Military Service Page was created/owned by Cpl David R. Evans (D.R.) to remember Marine MGen Jonas Mansfield Platt (Joe).

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Contact Info
Last Address
Brooklyn
Date of Passing
Jul 28, 2000
 

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Last Known Activity:

Major General Jonas M. Platt, decorated veteran of three wars, died on July 28, 2000 at the age of 80. For meritorious service as Assistant Chief of Staff, G-1, Headquarters, U.S. Marine Corps, from March 1968 through June 1970, his final assignment, he was awarded the Distinguished Service Medal.

   
Other Comments:

Born September 21, 1919 in Brooklyn, New York, he graduated from high school in Cranston, Rhode Island. He attended Norwich University in Vermont, graduating in 1940 with a Bachelor of Science degree in Civil Engineering, and was commissioned a Marine second lieutenant in June 1940.

While serving in the Marine Detachment aboard the battleship USS Washington during World War II, he rose from lieutenant to major, participating in Russian convoy operations in the Norwegian Sea, and six operations in the Pacific, including Guadalcanal, Tarawa, and Kwajalein. In 1944, after four months in the United States, he returned to the Pacific area. As a member of the 1st Marines, 1st Marine Division, he participated in the assault landings on Peleliu and Okinawa, earning the Navy Commendation and Bronze Star Medals, both with Combat V, and the Purple Heart.

Following the war, he organized and commanded the Provisional Marine Guard at United Nations Headquarters in New York. He later served at Headquarters Marine Corps, Washington, D.C., earned a Master's degree in Psychology at Ohio State University in 1949; and taught infantry tactics and instructional techniques at Marine Corps Schools, Quantico, Virginia, until December 1952.

During the Korean Conflict, he earned the Legion of Merit with Combat V as Commanding Officer, 1st Battalion, 5th Marines, and Assistant G-3, 1st Marine Division.

During subsequent assignments, he served again at Headquarters Marine Corps; was assigned to a joint staff in London; served briefly in the Mediterranean during the Suez crisis in 1956; and from 1958-60 commanded the Marine Barracks, Washington, D.C. - the oldest Post in the Corps.

Upon graduation from the National War College in 1961, he was assigned as Regimental Commander, 6th Marines, followed by duty as Assistant Chief of Staff, G-3 2d Marine Division. During his period the Division deployed for the Cuban Crisis in October 1962.

From 1963 to 1965, he served as Commanding Officer of The Basic School, Quantico, which trains the Marine Corps new second lieutenants.

General Platt was promoted to brigadier general on November 1, 1965, while en route to Vietnam. Upon his arrival, he became Assistant Division Commander, 3d Marine Division, at Chu Lai. While serving with the Division, he commanded Task Force Delta in operations Harvest Moon, Double Eagle I, Double Eagle II and Utah. In March 1966, he moved to Danang and became Chief of Staff for Lieutenant General Walt - commander of the Marine Forces in Vietnam.

While serving in Vietnam, he was awarded three United States decorations - the Silver Star Medal, and a second and third Legion of Merit with Combat V. He was also awarded three decorations by the Government of Vietnam - the National Order of Vietnam, and two Vietnamese Gallantry Crosses with Palm.

Detached in December 1966, General Platt reported to Headquarters Marine Corps in January 1967, and was assigned duty as Deputy Assistant Chief of Staff, G-1. He was promoted to major general on March 19, 1968. He retired from active duty on June 30, 1970.

A complete list of his medals and decorations includes: the Distinguished Service Medal, the Silver Star Medal, the Legion of Merit with two Gold Stars in lieu of second and third awards, the Bronze Star Medal with Combat V, the Navy Commendation Medal with Combat V, the Purple Heart Medal, the Presidential Unit Citation with two bronze stars, the Navy Unit Commendation, the American Defense Service Medal with Fleet clasp, the American Defense Service Medal, the European-African-Middle Eastern Campaign Medal with one bronze star, the Asiatic-Pacific Campaign Medal with one silver star and three bronze stars, the World War II Victory Medal, the China Service Medal, the National Defense Service Medal with one bronze star, the Korean Service Medal with two bronze stars, the Vietnam Service Medal with three bronze stars, the United Nations Service Medal, the Korean Presidential Unit Citation, the Vietnamese National Order, two Vietnamese Gallantry Crosses with Palm, and the Republic of Vietnam Campaign Medal.

   


Korean War/Korean Summer (1953)
From Month/Year
May / 1953
To Month/Year
July / 1953

Description
Korea, Summer 1953, 1 May - 27 July 1953. There was little activity anywhere along the front as 1953 began. Then, as spring approached, the enemy renewed his attacks against the Eighth Army 's outpost line. By July these attacks had increased in frequency and intensity until they were nearly as heavy as those of May 1951.

In January 1953 Van Fleet had twelve South Korean and eight U.N. divisions to defend the army front. Total strength of combat, service, and security troops was nearly 768,000. Opposing the U.N. forces were seven Chinese armies and two North Korean corps, totaling about 270, 000 troops. Another 531,000 Chinese and North Korean troops remained in reserve. With service and security forces, total enemy strength in Korea was estimated at more than a million men.

Other than a few patrol clashes, little fighting occurred during January and February 1953. On 11 February Lt. Gen. Maxwell D. Taylor took command of the Eighth Army as Van Fleet returned to the United States for retirement. The enemy increased his attacks during March, striking at outposts of the 2d and 7th Divisions and the 1st Marine Regiment. During the period 9-10 March the Chinese were successful in ambushing several U.N. patrols, inflicting heavy casualties in each instance. After these flare-ups the front quieted down until late May, when the enemy struck at the outposts of the U.S. 25th Division that were guarding the approaches to the Eighth Army's western positions. Although the enemy was successful in occupying three of the division outposts, he suffered nearly 3,200 casualties.

On the night of 10 June three Chinese divisions struck the ROK II Corps in the vicinity of Kumsong, attacking down both sides of the Pukhan River. Several attacks forced these units to withdraw about two miles. Both sides lost heavily; the Chinese suffered about 6,000 casualties and the ROK units about 7,400. By 18 June the attacks had subsided. By the end of the month, action along the entire front had returned to routine patrolling and light attacks.

Operation LITTLE SWITCH, an exchange of Allied and Communist sick and wounded prisoners, began on 20 April. When it was completed in the latter part of the month, 684 Allied prisoners had been exchanged for more than 6,000 Communists.

Armistice negotiations were resumed in April. The prisoner-of-war question was settled by providing each side an opportunity to persuade those captives who refused repatriation to their homeland to change their minds. By 18 June the terms of the armistice were all but complete; but on this date President Syngman Rhee ordered the release of 27,000 anti-Communist North Korean prisoners of war unilaterally, in protest against armistice terms which left Korea divided. U.N. officials disclaimed any responsibility for this action; but the enemy delegates denounced it as a serious breach of faith and delayed the final armistice agreement for another month. Enemy forces took advantage of this delay. On 13 July the Chinese launched a three-division attack against the left flank of the ROK II Corps and a one-division attack against the right flank of the U.S. IX Corps, forcing U.N. forces to withdraw about eight miles to positions below the Kumsong River. By 20 July, however, U.N. forces had counterattacked, retaken the high ground along the Kumsong River, and established a new main line of resistance. No attempt was made to restore the original line, as it was believed that the armistice would be signed at any time. Enemy casualties in July totaled about 72,000 men. Out of the five Chinese armies that had been identified in the attacks, the enemy had lost the equivalent of seven divisions.

By 19 July the negotiators at Panmunjom had reached an accord on all points. Details were worked out within a week and the Korean Armistice Agreement was signed at 1000 hours 27 July 1953.
   
My Participation in This Battle or Operation
From Month/Year
May / 1953
To Month/Year
July / 1953
 
Last Updated:
Mar 12, 2023
   
Personal Memories
   
Units Participated in Operation

7th Marines

1st Marines

2nd Bn, 1st Marines (2/1)

1st Bn, 1st Marines (1/1)

VMA-121

2nd Bn, 7th Marines (2/7)

HMR-161

E Co, 2nd Bn, 1st Marines (2/1)

VMGR-352

VMA-323

H&S Bn, 1st Marine Logistics Group (1st MLG)

MARDET USS Bremerton (CA-130)

 
My Photos From This Battle or Operation
No Available Photos

  2522 Also There at This Battle:
  • Abel, Daniel, Sgt, (1952-1955)
  • Adams, Richard F., Cpl, (1958-1964)
  • Agee, Joseph, Col, (1952-1983)
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