Question: Who founded the military branch that Leo Cullum served in?

full_context: Document 1: United States Marine Corps: After the war, the Marine Corps fell into a malaise that ended with the appointment of Archibald Henderson as its fifth Commandant in 1820. Under his tenure, the Corps took on expeditionary duties in the Caribbean, the Gulf of Mexico, Key West, West Africa, the Falkland Islands, and Sumatra. Commandant Henderson is credited with thwarting President Jackson's attempts to combine and integrate the Marine Corps with the Army. Instead, Congress passed the Act for the Better Organization of the Marine Corps in 1834, stipulating that the Corps was part of the Department of the Navy as a sister service to the Navy. This would be the first of many times that the independent existence of the Corps was challenged.
Document 2: Leo Cullum: Born in Newark, New Jersey, Cullum was raised in North Bergen, New Jersey and earned his undergraduate degree in 1963 from the College of the Holy Cross, where he majored in English. He joined the United States Marine Corps after graduating from college, earning a commission as a second Lieutenant. Upon completion of his flight training in Pensacola, Florida, Cullum deployed to Vietnam, where he flew more than 200 missions, mostly ground attacks in support of the infantry in addition to attacks on the Viet Cong supply lines on the Ho Chi Minh trail in Laos. Though the missions over Laos were not officially acknowledged, Cullum was baffled by the need for secrecy, saying "the North Vietnamese certainly knew it wasn't the Swiss bombing them".
Document 3: United States Armed Forces: The history of the U.S. Armed Forces dates to 14 June 1775, with the creation of the Continental Army, even before the Declaration of Independence marked the establishment of the United States. Continental Navy, established on 13 October 1775, and Continental Marines, established on 10 November 1775, were created in close succession afterwards by the Second Continental Congress in order to defend the new nation against the British Empire in the American Revolutionary War.
Document 4: John Kerry: Kerry was born in Aurora, Colorado and attended boarding school in Massachusetts and New Hampshire. He graduated from Yale University class of 1966 with a political science major. Kerry enlisted in the Naval Reserve in 1966, and during 1968–1969 served an abbreviated four-month tour of duty in South Vietnam as officer-in-charge (OIC) of a Swift Boat. For that service, he was awarded combat medals that include the Silver Star Medal, Bronze Star Medal, and three Purple Heart Medals. Securing an early return to the United States, Kerry joined the Vietnam Veterans Against the War organization in which he served as a nationally recognized spokesman and as an outspoken opponent of the Vietnam War. He appeared in the Fulbright Hearings before the Senate Committee on Foreign Affairs where he deemed United States war policy in Vietnam to be the cause of war crimes.
Document 5: Surgeon General of the United States: In 1798, Congress established the Marine Hospital Fund, a network of hospitals that cared for sick and disabled seamen. The Marine Hospital Fund was reorganized along military lines in 1870 and became the Marine Hospital Service -- predecessor to today's United States Public Health Service. The service became a separate bureau of the Treasury Department with its own staff, administration, headquarters in Washington, D.C, and the position of Supervising Surgeon (later Surgeon General).
Document 6: Jesse L. Brown: At the outset of the Korean War, "Leyte" was ordered to the Korean Peninsula, arriving in October 1950. Brown, an ensign, flew 20 combat missions before his F4U Corsair aircraft came under fire and crashed on a remote mountaintop on 4 December 1950 while supporting ground troops at the Battle of Chosin Reservoir. Brown died of his wounds despite the efforts of wingman Thomas J. Hudner Jr., who intentionally crashed his own aircraft in a rescue attempt, for which he was awarded the Medal of Honor.
Document 7: Dick Holm: Holm joined the CIA in the 1960s, and in his first assignment served in the CIA's secret war in Laos against the communists in the lead-up to the Vietnam War. Holm was then posted to the Congo and suffered near-fatal burns over 35% of his body from a plane crash. His horrific burns were treated by local tribesmen with a black paste made of snake oil and tree bark. He remained in their care for 10 days until he was finally rescued and quickly sent back to America for medical care.
Document 8: Richard Valle: Richard Valle graduated from the University of New Hampshire School of Hotel and Restaurant Management. He was a flight instructor in the Air Force during the Korean War, and continued to fly his own aircraft out of the Chatham, Hyannis and Marstons Mills airports until his death.
Document 9: Charles Moskos: Charles Moskos attended Princeton University, where he graduated "cum laude" in 1956, on tuition scholarship and waited tables to pay for room and board. He was drafted into the U.S. Army right after graduation in 1956. Moskos served with the Army's combat engineers in Germany where he wrote his first article, ""Has the Army Killed Jim Crow?"" for the "Negro History Bulletin". After leaving the military, he enrolled at UCLA, where he earned his master's and doctoral degrees in 1963.
Document 10: Military history of the United States: The Vietnam War was a war fought between 1959 and 1975 on the ground in South Vietnam and bordering areas of Cambodia and Laos (see Secret War) and in the strategic bombing (see Operation Rolling Thunder) of North Vietnam. American advisors came in the late 1950s to help the RVN (Republic of Vietnam) combat Communist insurgents known as "Viet Cong." Major American military involvement began in 1964, after Congress provided President Lyndon B. Johnson with blanket approval for presidential use of force in the Gulf of Tonkin Resolution.
Document 11: Jacob Zeilin: Jacob Zeilin (July 16, 1806 – November 18, 1880) was the United States Marine Corps' first non-brevet flag officer. He served as the seventh commandant of the United States Marine Corps, from 1864 to 1876.
Document 12: Jethro Sumner: Sumner was named the commanding officer of the 3rd North Carolina Regiment of the North Carolina Line, a formation of the Continental Army, in 1776, and served in both the Southern theater and Philadelphia campaign. He was one of five brigadier generals from North Carolina in the Continental Army, in which capacity he served between 1779 and 1783. He served with distinction in the battles of Stono Ferry and Eutaw Springs, but recurring bouts of poor health often forced him to play an administrative role, or to convalesce in North Carolina. Following a drastic reduction in the number of North Carolinians serving with the Continental Army, Sumner became a general in the state's militia but resigned in protest after the North Carolina Board of War awarded overall command of the militia to William Smallwood, a Continental Army general from Maryland. After the end of the war in 1783, Sumner helped to establish the North Carolina Chapter of the Society of the Cincinnati, and became its first president. He died in 1785 with extensive landholdings and 35 slaves.
Document 13: Continental Army: On June 15, 1775, the Congress elected by unanimous vote George Washington as Commander - in - Chief, who accepted and served throughout the war without any compensation except for reimbursement of expenses.
Document 14: Samuel Nicholas: Samuel Nicholas (1744 – 27 August 1790) was the first officer commissioned in the United States Continental Marines (predecessor to the United States Marine Corps) and by tradition is considered to be the first Commandant of the Marine Corps.
Document 15: United States Marine Corps: The history of the Marine Corps began when two battalions of Continental Marines were formed on 10 November 1775 in Philadelphia as a service branch of infantry troops capable of fighting on both at sea and on shore. By the mid-20th century, the U.S. Marine Corps had become a major theorist of amphibious warfare, which were utilized in the Pacific theater of World War II. As of 2016, the USMC has around 182,000 active duty members and some 38,500 reserve Marines. It is the smallest U.S. military service within the DoD.
ground_truth: Samuel Nicholas
sub_queries: Leo Cullum >> military branch Answer: United States Marine Corps
United States Marine Corps >> founded by Answer: Samuel Nicholas