Question: Robert Lincoln Patterson served during World War I in a branch of the Armed Forces that dates its institutional inception to what year?

Context paragraphs:
Robert Lincoln Patterson: Robert Lincoln Patterson served in the California legislature and during World War I he served in the United States Army.

Irish in the British Armed Forces: The Irish in the British Armed Forces refers to the history of Irish people serving in the British Armed Forces (including the British Army, the Royal Navy, the Royal Air Force and other elements).  Ireland was ruled as part of the United Kingdom from 1800-1922 and during this time in particular many Irishmen fought in the British Army.  Different social classes joined the military for various reasons, including the Anglo-Irish officers who thoroughly identified with the British Empire, while others, typically poorer Irish Catholics did so to feed their families or seeking adventure.  Many Irishmen and members of the Irish diaspora in Britain and also Ulster-Scots served in both World War I and World War II as part of the British forces.  However, especially since the advent of Irish independence and The Troubles, the topic of enlistment in the British forces has been controversial for the Irish at home, but does still occur.  Since partition, Irish citizens have continued to have the right to serve in the British Army.  Since 2007, when troops finally withdrew from the streets of Northern Ireland, the number of Irish citizens joining has increased, reaching its highest levels since World War II.

Belgian Armed Forces: The Belgian Armed Forces (Dutch: "Defensie" ; French: "La Défense" ) is the national military of Belgium.  The Belgian Armed Forces was established after Belgium became independent in October 1830.  Since that time Belgian armed forces have fought in World War I, World War II, the Cold War (Korean War and army of occupation of the Federal Republic of Germany), Kosovo, Somalia and Afghanistan.  The ParaCommando Brigade intervened several times in Central-Africa, for maintaining public order and evacuation of Belgian citizens.  The Armed Forces comprise four branches: the Land Component, the Air Component, the Marine Component and the Medical Component.  It is currently active in Lebanon, Afghanistan, the Gulf of Aden and conducting anti-ISIS operations in Iraq.

United States Navy Baseball: The modern United States Navy Baseball Club was founded by retired U.S. Navy Commander Terry Allvord in Pensacola, Florida in 1990 before moving to San Diego for the 1993 season.  This program is the leader in armed forces baseball in the modern era.  Allvord went on to establish over 40 single-service armed forces teams in every branch of the military around the globe.  Tryouts are held every year to form the most talented military and first responders team to compete as the U.S. Military All-Stars during the annual "Red, White and Blue Tour" The team features active duty, reserve, veterans, Delayed Entry Program and first responders.  The continuation of two wars has limited the availability of armed forces players.  As a result, beginning in 2010, the team will be known as the "Heroes of the Diamond" allowing a limited number of former MLB, current professional, summer collegiate and first responders the opportunity to join the tour.  Players interested in the military and willing to support the mission will continue to pay their own expenses while off-duty to compete against the finest professional, independent and summer collegiate programs in the world.

Ibrahim El-Orabi: Ibrahim Abdel Ghafour El Orabi (Arabic: إبراهيم عبد الغفور العرابي‎ ‎ , ] ) (born 20 May 1931) was an Egyptian Army Lieutenant General and the 13th and former Chief of Staff of the Egyptian Armed Forces.  He was a member of the Free Officers Movement as defined by the Egyptian revolution of 1952, which led to King Farouk abdicated to his son King Ahmed Fouad II, until announced the establishment of the Republic in 1953.  He began his military career at the end of the forties and witnessed all Arab-Israeli wars and all the political volatility that passed by Egypt since the 1948 Arab–Israeli War to the Yom Kippur War where he was one of its heroes.  He previously served as the 7th Chief of Operations of the Armed Forces.  Prior to that, he served as Commander of the Second Field Army, as Commander of the 21st Armored Division, as Commander of the Arab Forces in Iraq, and as Commander of the Armored Corps in Yemen war.  As the Chief of Staff of the Egyptian Armed Forces, Orabi was formerly the second highest-ranking military officer in all of the Egyptian Armed Forces.  Orabi assumed his former assignment on 16 July 1983.  Best known for severe discipline and rigor.

Italian Armed Forces: The Italian Armed Forces (italian: "Forze armate italiane") encompass the Italian Army, the Italian Navy and the Italian Air Force.  A fourth branch of the armed forces, known as the Carabinieri, take on the role as the nation's military police and are also involved in missions and operations abroad as a combat force.  Despite not being a branch of the armed forces, the Guardia di Finanza is part of the military and operates a large fleet of ships, aircraft and helicopters, enabling it to patrol Italy's waters and to eventually participate in warfare scenarios.  These five forces have military status and are all organized along military lines, comprising a total of 350,000 men and women with the official status of active military personnel.  The President of the Italian Republic heads the armed forces as the President of the High Council of Defence established by article 87 of the Constitution of Italy.  According to article 78, the Parliament has the authority to declare a state of war and vest the necessary powers in the Government.

17th Parachute Engineer Regiment: The 17th Parachute Engineer Regiment (French: "17 Régiment de Génie Parachutiste, 17 RGP" ) is heir to the traditions of the 17th Colonial Engineer Regiment (French: ", 17RGC" ) which illustrated itself during World War II.  It is the only airborne engineer unit of the French Army forming the engineering component of the 11th Parachute Brigade and secures all the specific airborne engineering missions relative to para assaulting at the level of deep reconnaissance as well as operations relative to para demining and handling explosives.  The regiment has been present non-stop since 1975 on all theatres of operations (Lebanon, Tchad, New Caledonia, French Guiana, Pakistan, Kurdistan, Kuwait, Cambodia, Somalia, Rwanda, Gabon, Mozambique, ex-Yugoslavia, Albania, Kosovo, Afghanistan, Mali and others).  For its various combat operational deployments, the 17 RGP was cited 3 times at the orders of the armed forces, 2 times at the orders of the armed forces corps, and three of its combat companies cited at the orders of the armed forces ( 2nd combat company) in addition to armed forces corps (1st and 3rd combat companies).

Hispanic Americans in World War II: Hispanic Americans, also referred to as Latinos, served in all elements of the American armed forces in the war.  They fought in every major American battle in the war.  Between 250,000 and 500,000 Hispanic Americans served in the U.S. Armed Forces during World War II, out of a total of 12,000,000, constituting 2.3% to 4.7% of the U.S. Armed Forces.  The exact number is unknown as, at the time, Hispanics were not tabulated separately, but were generally included in the general white population census count.  Separate statistics were kept for African Americans and Asian Americans.

United States Air Force: The United States Air Force (USAF) is the aerial and space warfare service branch of the United States Armed Forces and one of the seven American uniformed services.  Initially part of the United States Army, the USAF was formed as a separate branch of the U.S. Armed Forces on 18 September 1947 under the National Security Act of 1947.  It is the most recent branch of the U.S. Armed Forces to be formed.  The USAF is the largest and one of the most technologically advanced air forces in the world.  The service articulates its core functions as Nuclear Deterrence Operations, Air Superiority, Space Superiority, Cyberspace Superiority, Command and Control, Global Integrated ISR, Global Precision Attack, Special Operations, Rapid Global Mobility, Personnel Recovery, Agile Combat Support, and Building Partnerships.

United States Army: The United States Army (USA) is the largest branch of the United States Armed Forces and performs land-based military operations.  It is one of the seven uniformed services of the United States and is designated as the Army of the United States in the United States Constitution, Article 2, Section 2, Clause 1 and United States Code, Title 10, Subtitle B, Chapter 301, Section 3001.  As the oldest and most senior branch of the U.S. military in order of precedence, the modern U.S. Army has its roots in the Continental Army, which was formed (14 June 1775) to fight the American Revolutionary War (1775–1783)—before the United States of America was established as a country.  After the Revolutionary War, the Congress of the Confederation created the United States Army on 3 June 1784 to replace the disbanded Continental Army.  The United States Army considers itself descended from the Continental Army, and dates its institutional inception from the origin of that armed force in 1775.

Supporting paragraphs: Robert Lincoln Patterson United States Army
Answer: 1775