Jablonsky was born January 10, 1909, in Missouri, US, to mother Eugenia from England, and father Arthur from Germany. His parents did not have their own home; instead they lived along with Arthur's parents in their home in St. Louis County. Missouri. In 1927, he attended Washington University in St. Louis, and in 1929 he was made captain of the football team. He was also on the College Football All-America Team. After graduating from Washington University, he enrolled in the United States Military Academy at West Point, New York, where he continued to play football as a guard from 1931 to 1933, and became Army's captain in 1933; that year Army had a record of 9-1 and outscores its opponents 227 to 26. He graduated from the academy in 1934, but remained at West Point as an assistant coach for nine years. He was also married to his first wife Dorothy Jablonsky during these years, and the 1940 census shows he has had his first children, daughter Jean, born 1937 in Virginia, and son David Jablonsky, born 1939 in Panama.
Military career
On May 31, 1943, he was promoted to the rank of lieutenant colonel and appointed executive officer of 515th Parachute Infantry Regiment at Fort Benning, Georgia. He remained the executive officer until November 1943, when the 515th PIR moved to Camp Mackall, North Carolina. On March 7, 1944, the "Jumping Wolves" became a part of the 13th Airborne Division at Camp Mackall. On January 25, 1945, the 13th Airborne Division received their overseas orders and embarked for Europe. They arrived at Le Havre, France, on February 8. On February 12 or 13, Colonel Harvey J Jablonsky, assumed command of the "Jumping Wolves". Although the unit did prepare for combat in Operation Comet, the strength of the Allied forces continually negated the need for airborne operations. Redeployment began on July 18, 1945, for the fighting in the Pacific, but by the time the unit reached New York, the war in the Pacific was over. The 515th Parachute Infantry Regiment was deactivated at Fort Bragg, North Carolina, on February 25, 1946. In 1946, he returned to West Point to serve as assistant coach. Jablonsky is listed as a commander of the from July 1948 to June 1950. In February and March 1950, he participated in Exercise Swarmer, the largest peacetime airborne maneuvers ever conducted. The 187th airborne received the highest performance scores in this exercise, which was directly related to their being chosen to deploy to Korea as an airborne regimental combat team. In September 1950, elements of the 187th were attached to the 1st Marine Division to participate in the amphibious landings at Inchon. Jablonsky served on the Joint Airborne Troop Board. Harvey commanded the 1st Armored Division at Fort Hood, Texas, during 1963. Harvey also served in the Vietnam War. Jablonsky was sent to Tehran, Iran during 1964–65, and he became chief military adviser from 1965 to 1968. As chief military adviser, Major General Jablonsky's position was "Chief, ARMISH/MAAG, Tehran, August 1965–July 1968". Jablonsky retired from service in 1968 in Killeen, Texas, where he had previously served as the commanding general of the 1st Armored Division. For his actions in the Vietnam War, he was awarded the Legion of Merit on August 13, 1965, and the Army Distinguished Service Medal on August 22, 1968.
He went on to become vice president of the Northrop Corporation, where he furthered his career within the private defense sector. He was sent back to Iran in 1970 by Northrop to work on an "advanced $225 million telecommunications system". He died of congestive heart failure on April 4, 1989, at the Nursing Center of the Army Residence in San Antonio, Texas. He was aged 80 and was survived by his wife Virgie, three daughters, son Colonel David Jablonsky and a stepson.
