John Herschel Glenn Jr.

The Marine Aviator Who Fought Two Wars and Orbited Earth

Before John Glenn ever climbed into a spacecraft, he had already flown 149 combat missions in two wars. Before he became the first American to orbit Earth, he had faced enemy fire over the Pacific, flown ground-attack missions in Korea and shot down three MiG fighters near the Yalu River. John Herschel Glenn Jr. did not simply witness the defining events of the twentieth century. He repeatedly placed himself at their centre.

Born on 18 July 1921 in Cambridge, Ohio, Glenn grew up in nearby New Concord, where his fascination with aviation began during the rapid transformation of flight from daring spectacle into military necessity. He studied engineering at Muskingum College, but the entry of the United States into the Second World War redirected his ambitions toward military service. In March 1942, he entered the Naval Aviation Cadet Program. He earned his wings and was commissioned in the United States Marine Corps in 1943.

Following advanced flight training, Glenn joined Marine Fighter Squadron 155 and flew the powerful F4U Corsair in the Marshall Islands. He completed 59 combat missions during the Second World War, confronting hazardous weather, enemy fire and the unforgiving demands of carrier-era aviation. His service was recognized through the American Campaign Medal, Asiatic-Pacific Campaign Medal with one bronze service star and World War II Victory Medal. After the war, he served with Marine Fighter Squadron 218 on the North China patrol and on Guam, earning the China Service Medal and Navy Occupation Service Medal.

The Korean War placed Glenn back in combat and tested him at an even higher level. He flew 63 ground-support missions in the F9F Panther with Marine Fighter Squadron 311, attacking enemy positions while exposed to intense antiaircraft fire. He later joined the United States Air Force as an exchange pilot and flew another 27 combat missions in the F-86 Sabre. During the final nine days of fighting, Glenn shot down three MiG fighters along the Yalu River. His determination to seek out dangerous assignments earned him the nickname “MiG Mad Marine.”

Glenn’s wartime record brought him six awards of the Distinguished Flying Cross and eighteen awards of the Air Medal. His Korean service was also recognized by the Presidential Unit Citation, Navy Unit Commendation, National Defense Service Medal with one bronze service star, Korean Service Medal with two bronze service stars, United Nations Service Medal and Republic of Korea Presidential Unit Citation. Official sources agree on the six Distinguished Flying Cross awards, although a discrepancy remains in the surviving Marine Corps description of the exact ribbon devices. For biographical purposes, the historically safest wording is simply that Glenn received the Distinguished Flying Cross six times.

Combat was only one test of Glenn’s ability. After Korea, he attended the Naval Test Pilot School at Patuxent River and worked on the evaluation of advanced Navy and Marine Corps aircraft. In July 1957, he piloted an F8U Crusader from Los Angeles to New York in three hours and twenty-three minutes, completing the first transcontinental flight to average supersonic speed. It was a record-setting demonstration of endurance, precision and technical mastery that helped establish Glenn as one of America’s leading military test pilots.

In 1959, NASA selected Glenn as one of the Mercury Seven, the first group of American astronauts. At the height of the Cold War, the United States and Soviet Union were competing not only for scientific achievement, but also for prestige, technological leadership and strategic influence. Glenn brought to Project Mercury the discipline of a combat aviator, the judgement of a test pilot and an intense understanding of cockpit design and aircraft controls.

Then came 20 February 1962.

Strapped inside the cramped Friendship 7 capsule, John Glenn launched aboard Mercury-Atlas 6 and became the first American to orbit Earth. During a flight lasting four hours and fifty-five minutes, he circled the planet three times. A warning signal raised fears that the spacecraft’s heat shield might have become loose, creating potentially fatal uncertainty during re-entry. Glenn remained composed and completed the descent safely, splashing down in the Atlantic Ocean and returning to a nation that had followed his mission with extraordinary attention.

Friendship 7 transformed Glenn into an international symbol of American courage and technological ambition. For his contribution to the space program, he received the NASA Distinguished Service Medal and was later awarded the Congressional Space Medal of Honor. These honours recognized not only the success of his orbital mission, but also his contribution to the development of American human spaceflight.

Glenn left NASA in 1964 and retired from the Marine Corps as a colonel on 1 January 1965. His commitment to public service continued in a different arena. Elected to the United States Senate from Ohio in 1974, he served for twenty-four years and became an influential voice on defence policy, government accountability, science and nuclear nonproliferation. His work in the Senate demonstrated the same deliberate preparation and sense of responsibility that had defined his military and space careers.

Could a decorated combat pilot and pioneering astronaut return to space more than three decades after his first mission? Glenn answered that question in 1998. At age 77, he flew aboard Space Shuttle Discovery as a payload specialist on STS-95. He became the oldest person to fly in space at that time and participated in scientific investigations examining parallels between the effects of spaceflight and the human ageing process. The mission completed 134 Earth orbits and gave Glenn a combined total of more than 218 hours in space.

In 2012, President Barack Obama presented Glenn with the Presidential Medal of Freedom, the United States’ highest civilian honour. The award recognized a lifetime that connected Marine Corps aviation, combat service, space exploration and public leadership. In presenting the medal, the White House highlighted Glenn’s service as a Marine pilot, the first American to orbit Earth and a senator who worked to limit the spread of nuclear weapons.

John Glenn died on 8 December 2016. His legacy cannot be reduced to a single flight, battle or political office. He defended his country in two wars, helped lead the United States into orbital spaceflight, returned to orbit at an age when most people had long since retired and devoted twenty-four years to elected public service.

John Glenn did more than witness history. He flew into it repeatedly, carrying the discipline of a Marine aviator from battlefield skies to the edge of space and proving that courage, preparation and service can shape the course of a nation.