Keller was ordered to the Naval Air Station Jacksonville, Florida, in December 1940 and reported for full aviation training as a member of the first class of naval aviation cadets there. He received his Naval aviator's wings upon commissioning to second lieutenant on June 3, 1941, and was ordered to Naval Air Station Pensacola, Florida. Keller then served for 19 months as Flight instructor and was promoted consecutively to first lieutenant and captain.[2][3][4][1]
He then embarked for South Pacific and joined the Marine Fighter Squadron 212 as Squadron Ordnance Officer, responsible for planning and maintenance of squadron's guns and bombs. Keller was stationed at the Midway Island and following the promotion to major, he was appointed Squadron Executive officer under Lieutenant colonel Frederick R. Payne Jr.[2][3][4][1]
Keller remained with the squadron for few months, before he was transferred to Marine Attack Squadron 223 ("Bulldogs") stationed on Hawaii. He was appointed Squadron Executive officer under famous Marine flyer Marion E. Carl and took part in the training and combat air patrols over Hawaii until August 1943, when the whole squadron was transferred to Midway Island. After a brief stay there, squadron moved to Quoin Hill Airfield at New Hebrides from where they escorted allied bombers against ground targets at Green Islands and Bougainville.[2][5][3][4][1]
During the escort mission with his Vought F4U Corsair near Rabaul, New Britain, Keller destroyed one Japanese airplane and damaged two others and received Distinguished Flying Cross. He succeeded Marion Carl as Squadron commander in February 1944 and was stationed with his squadron at Piva Airfield at Bougainville. During the Japanese artillery shelling of the field on March 8, 1944, three aircraft were destroyed, one enlisted man killed and Keller has been hit with a shrapnel in the hip. He spent four weeks in hospital and was later decorated with the Purple Heart for his wounds. During his tenure as Squadron's commander, Keller hosted prominent aviator and Medal of Honor recipient Charles Lindbergh, who flew three combat missions with his squadron.[2][6][5][3][4]
He subsequently rejoined his squadron and remained in command until the beginning of July 1944, when he returned to the United States. Keller was ordered for night fighter training, which he completed few months later and transitioned into the Grumman F7F Tigercat. He subsequently assumed command of Marine Fighter Attack Squadron 531 ("Grey Ghosts") and deployed to the Pacific theater again in order to cover the planned Invasion of Japan.[2][7][3][4]
While still at sea, atomic bombs were dropped on Hiroshima and Nagasaki, which forced Japan sign the surrender in September 1945. Keller was transferred to the command of Marine Night Fighter Squadron 533 ("Black Mac's Killers") and embarked for North China in early October 1945. He was stationed near Beiping and his squadron assisted in the repatriation of Japanese forces to their home islands. In addition to his Distinguished Flying Cross and Purple Heart, Keller received ten awards of Air Medal for his bomber escort missions. For his service in North China, he was decorated with Order of the Cloud and Banner.[2][3][4][1]
General Shepherd attached Keller and his squadron to the newly formed 1st Provisional Marine Brigade under Brigadier general Edward A. Craig at San Diego. They embarked for South Korea in the middle of July 1950 and Keller's squadron established its headquarters at Itami Air Base, Japan, where it was equipped with bombs and rockets. He then commanded Black Sheep Squadron during the Battle of Pusan Perimeter, where his aircraft attacked enemy equipment, personnel and railroad cars near Chinju and Sinban-ni. It was the first Marine air attack in the Korean War.[2][3][4]
He and his wingman then landed at Taegu, where the Joint Army-Navy Tactical Control Air Center was located, only 10 miles from enemy frontlines and after exchanging information and receiving a briefing on the situation, Keller returned with his wingman to escort carrier USS Sicily. When Marine air and ground units were reinforced in August 1950, Black Sheep Squadron got new commanding officer, lieutenant colonel Walter E. Lischeid and Major Keller was appointed his executive officer.[2][8][3][4]
During September 1950, Keller participated in the landing at Inchon and Recapture of Seoul, when his aircraft successfully supported ground units advance and received his second and third Distinguished Flying Crosses. His commander, Lieutenant Colonel Lischeid, was killed by enemy anti-aircraft fire on September 25, 1950, and Keller assumed the command of Black Sheep squadron again.[2][6][8][4][1]
On November 11, 1950, Keller distinguished himself again, when on the mission of locating and attacking well-concealed enemy mortar and machine gun positions impeding the advancement of friendly forces in the vicinity of Yuha-ri and Ungi-gang. He boldly piloted his aircraft at brush-top level in an attempt to draw the anti-aircraft fire and reveal their positions. After repeated efforts, he observed flashes of hostile guns directed against him and, immediately carrying out a series of attacks, personally scored direct hits with rockets and machine gun fire. Directing his strike group in a coordinated attack which covered the targets in a barrage of rockets, napalm and machine gun fire, he contributed materially to the success of friendly ground forces in advancing on their objective. For this act of valor, he was decorated with the Silver Star.[2][6][4]
Keller remained with the Black Sheep Squadron until November 18 that year, when he was appointed 1st Marine Aircraft Wing liaison officer to the Fifth Air Force-Eighth United States Army Joint Operations Center in Seoul. Major General Earle E. Partridge, commanding general of Fifth Air Force and Major General Field Harris, commanding general of 1st Marine Aircraft Wing, reached agreement that marines could direct their own aircraft to targets, while keeping Fifth Air Force informed. This arrangement was in response to the fact, that communications across the Korean peninsula between the two headquarters were relatively unreliable. Keller's primary duties were to advise about Marine air capabilities and actions. However, he remained in that capacity just until mid-December 1950, when he received orders for return to the United States.[2][4][1]
Post Korea
Following his return, Keller was appointed close air support officer and helicopter operations officer at the newly established Tactics and Techniques Board in the Marine Corps Development Center, Quantico, Virginia. While in this capacity, he participated in the development of helicopter doctrine and was promoted to lieutenant colonel in January 1951. Keller remained in that assignment until June 1952, when he was transferred to Camp Lejeune, North Carolina, for duty again as close air support officer and helicopter operations officer for Joint Landing Force Board. He was later ordered to Washington, D.C., for duty as head, operational planning section, Plans and Readiness Branch at the Division of Aviation under Major general William O. Brice.[2][4]
Keller was transferred to the Headquarters Marine Corps in Washington, D.C., in June 1965 and was assigned to the Office of the Deputy Chief of Staff (Plans and Programs), where he assumed duty as Head, Joint and Special Plans Team. He later served in that office as director of Joint Planning Group and was promoted to brigadier general on August 4, 1966. Keller was ordered to South Vietnam at the end of March 1967 and assumed duty as Assistant Wing Commander, 1st Marine Aircraft Wing with headquarters in Da Nang. For his previous service with Joint Planning Group, he was decorated with the Navy Commendation Medal.[2][4]
While in this capacity, he served as Deputy consecutively to Major generals Louis B. Robertshaw and Norman J. Anderson and was co-responsible for the several hundred of transport, observation and fighter airplanes and helicopters of the Wing. Keller also took part in several observation flights in helicopter including one with his son, Bob Jr., who served as helicopter pilot.[2][9][3][4][1]
Following his return stateside and brief leave with family, Keller was ordered to Naval Air Station Glenview, Illinois, where he relieved Major general Arthur H. Adams as Commanding general, Marine Air Reserve Training Command with additional duty as Commanding general, 4th Marine Aircraft Wing. While in this capacity, Keller was responsible for the training of reserve marine aviation units and replacements for units deployed in South Vietnam and elsewhere in the World. He was promoted to Major general on August 4, 1969, and remained at Glenview until March 1971. For his service with 4th Marine Aircraft Wing, Keller was decorated with his second Legion of Merit.[2][6][4]
He was subsequently ordered to the headquarters, United States Pacific Command on Hawaii, where he assumed duty as Assistant Chief of Staff for Operations (J-3) under Admiral John S. McCain Jr. Keller remained in that capacity until June 1972, when he was ordered back to the continental States for new assignment. He received his third Legion of Merit for service with Pacific Command and was promoted to lieutenant general on July 1, 1972.[2]
General Keller retired from active duty on September 1, 1974, after 34 years of commissioned service and received the Navy Distinguished Service Medal by Commandant Robert E. Cushman Jr. during the retirement ceremony. A parade was held in his honor.[2][6][4]
Retirement
Upon his retirement from the Marine Corps, Keller settled in Pensacola, Florida, a hometown of his wife Lucille. He cooperated with National Museum of Naval Aviation in Pensacola and served on the board of trustees for 14 years. Keller was also active in several organizations including Retired Officers Association; Golden Eagles; Association of Naval Aviation; China Marines and Marine Corps Historical Foundation.[11][3]
Lieutenant general Robert P. Keller died on November 13, 2010, aged 90, at his home in Pensacola, Florida. He was buried beside his wife, former Lucille Noris (1920–2003) at Barrancas National Cemetery. They had two sons: Robert Jr. (lieutenant colonel, USMC ret.) and Ronald R. (captain, USMC ret.); and two daughters: Anne Elaine and Joan Elizabeth.[2][12]
Decorations
Here is the ribbon bar of Lieutenant General Robert P. Keller:[6]