Question: Who established the branch of the U.S. military in which Enrique Romero-Nieves served?

full_context: Document 1: 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 2: 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 3: Agustín Ramos Calero: Sergeant First Class Agustín Ramos Calero (June 2, 1919 – February 10, 1989) was awarded 22 decorations and medals from the U.S. Army for his actions during World War II, thus becoming the most decorated Puerto Rican and Hispanic soldier in the United States military during that war.
Document 4: 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 5: 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 6: Hispanics in the United States Marine Corps: Hispanics in the United States Marine Corps, such as Private France Silva who during the Boxer Rebellion became the first Marine of the thirteen Marines of Hispanic descent to be awarded the Medal of Honor, and Private First Class Guy Gabaldon who is credited with capturing over 1,000 enemy soldiers and civilians during World War II, have distinguished themselves in combat. Hispanics have participated as members of the United States Marine Corps in the Boxer Rebellion, World War I, the American intervention in Latin America also known as the Banana Wars, World War II, the Korean War, the Vietnam War, the Gulf War and most recently in the military campaigns of Afghanistan and Iraq.
Document 7: 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 8: 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 9: 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.
Document 10: 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 11: Eugene A. Obregon: Eugene Arnold Obregon (November 12, 1930 – September 26, 1950) was a United States Marine who was posthumously awarded the United States' highest military decoration for valor — the Medal of Honor — for sacrificing his life to save that of a wounded comrade during the Second Battle of Seoul. On September 26, 1950, Private First Class Obregon was fatally wounded by enemy machine gun fire while using his body to shield a wounded fellow Marine.
Document 12: 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 13: Brian Chontosh: Major Brian R. Chontosh (born 1974 in Rochester, New York) is a retired United States Marine Corps officer who was awarded the Navy Cross for his heroic actions during the 2003 Invasion of Iraq. At the time, he was a platoon leader for Weapons Company, 3rd Battalion, 5th Marines, 1st Marine Division.
Document 14: Juan César Cordero Dávila: Major General Juan César Cordero Dávila (June 7, 1904 – July 20, 1965), was the commanding officer of the 65th Infantry Regiment during the Korean War, rising to become one of the highest ranking ethnic officers in the United States Army.
Document 15: Enrique Romero-Nieves: Private First Class Enrique Romero-Nieves born in Culebra, Puerto Rico, was a member of the United States Marine Corps who served in the Korean War. He was subsequently awarded the Navy Cross for heroism in battle.
ground_truth: Samuel Nicholas
sub_queries: Enrique Romero-Nieves >> member of Answer: United States Marine Corps
United States Marine Corps >> founded by Answer: Samuel Nicholas