Question: What year was the Commander-in-Chief abolished in the birthplace for Woodbury Langdon?

full_context: Document 1: Henry Hubbard: Henry Hubbard (May 3, 1784June 5, 1857) was a member of the United States House of Representatives from 1829 to 1835, a Senator from New Hampshire during 1835 to 1841, and the Governor of New Hampshire from 1842 to 1844.
Document 2: 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 3: Supreme Commander of the Swedish Armed Forces: The Supreme Commander is, apart from the honorary ranks held by the King of Sweden and in the past other members of the Swedish Royal Family, by unwritten convention normally the only professional military officer on active duty to hold the highest rank (a four-star General or Admiral). An exception was made 2009-2014 when Håkan Syrén was chairman of the European Union Military Committee.
Document 4: Woodbury Langdon: Woodbury Langdon (1739 – January 13, 1805) was a merchant, statesman and justice from Portsmouth, New Hampshire. He was the brother of John Langdon, a Founding Father who served as both senator from and Governor of New Hampshire, and father-in-law of Edmund Roberts.
Document 5: Canadian Armed Forces: The Canadian Joint Operations Command is an operational element established in October 2012 with the merger of Canada Command, the Canadian Expeditionary Force Command and the Canadian Operational Support Command. The new command, created as a response to the cost-cutting measures in the 2012 federal budget, combines the resources, roles and responsibilities of the three former commands under a single headquarters.
Document 6: James Schureman: James Schureman (February 12, 1756January 22, 1824) was an American merchant and statesman from New Brunswick, New Jersey. He represented New Jersey in the Continental Congress as well as the United States House of Representatives and United States Senate.
Document 7: John Langdon Sibley: John Langdon Sibley (29 December 1804 – 9 December 1885) was the librarian of Harvard University from 1856 to 1877.
Document 8: Chief of Army Staff (Pakistan): In 1969, the title of the army command was changed from ``Commander - in - Chief ''to`` Chief of Staff'' with President Yahya Khan acting as Commander - in - Chief and General A.H. Khan as Chief of Staff. On 20 March 1972, the post was renamed as ``Chief of Army Staff ''(COAS) with Lieutenant - General Tikka Khan elevated to four star rank to be appointed as army's first chief of army staff.
Document 9: John Kerry: Kerry's paternal grandparents, shoe businessman Frederick A. "Fred" Kerry and musician Ida Lowe, were immigrants from the Austro-Hungarian Empire. Fred was born as "Fritz Kohn" before he and Ida took on the "Kerry" name and moved to the United States. Fred and Ida were born Jewish, and converted to Catholicism together in Austria. His maternal ancestors were of Scottish and English descent, and his maternal grandfather James Grant Forbes II was a member of the Forbes family, while his maternal grandmother Margaret Tyndal Winthrop was a member of the Dudley–Winthrop family. Margaret's paternal grandfather Robert Charles Winthrop served as the 22nd Speaker of the U.S. House of Representatives. Robert's father was Governor Thomas Lindall Winthrop. Thomas' father John Still Winthrop was a great-great-grandson of Massachusetts Bay Colony Governor John Winthrop and great-grandson of Governor Thomas Dudley. Through his mother, John is a first cousin once removed of French politician Brice Lalonde.
Document 10: Canadian Armed Forces: The responsibility for military command remained with the British Crown-in-Council, with a commander-in-chief for North America stationed at Halifax until the final withdrawal of British Army and Royal Navy units from that city in 1906. Thereafter, the Royal Canadian Navy was formed, and, with the advent of military aviation, the Royal Canadian Air Force. These forces were organised under the Department of Militia and Defence, and split into the Permanent and Non-Permanent Active Militias—frequently shortened to simply The Militia. By 1923, the department was merged into the Department of National Defence, but land forces in Canada were not referred to as the Canadian Army until November 1940.
Document 11: John Adams: John Adams (October 30 (O.S. October 19) 1735 -- July 4, 1826) was an American statesman and Founding Father who served as the first Vice President (1789 -- 97) and second President of the United States (1797 -- 1801). He was a lawyer, diplomat, political theorist, and a leader of the movement for American independence from Great Britain. He was also a dedicated diarist and correspondent, particularly with his wife and closest advisor, Abigail.
Document 12: Commander-in-Chief, Portsmouth: The post of Commander-in-Chief, Portsmouth was merged with that of Commander-in-Chief, Plymouth in 1969 to form the post of Commander-in-Chief, Naval Home Command. The posts of Second Sea Lord and Commander-in-Chief Naval Home Command were amalgamated in 1994 following the rationalisation of the British Armed Forces following the end of the Cold War. In 2012, however, all distinct Commander-in-Chief appointments were discontinued, with full operational command being vested instead in the First Sea Lord; he now flies his flag from HMS "Victory".
Document 13: John Wheelock: John Wheelock (January 28, 1754 – April 4, 1817) was the eldest son of Eleazar Wheelock who was the founder and first president of Dartmouth College; John Wheelock succeeded his father as the College’s second president.
Document 14: Ministry of Supply: The Ministry of Supply was abolished in late 1959 and its responsibilities passed to the Ministry of Aviation, the War Office and the Air Ministry. The latter two ministries were subsequently merged with the Admiralty to form the Ministry of Defence.
Document 15: John Quincy Adams: John Quincy Adams (/ ˈkwɪnzi / (listen); July 11, 1767 -- February 23, 1848) was an American statesman who served as a diplomat, minister and ambassador to foreign nations, and treaty negotiator, United States Senator, U.S. Representative (Congressman) from Massachusetts, and the sixth President of the United States from 1825 to 1829. He was a member of the Federalists like his famous influential father, but later switched to the Jeffersonian Democratic - Republican, National Republican, and later the Anti-Masonic and Whig parties when they were organized. He was the son of second President John Adams (1735 - 1826, served 1797 - 1801), and his wife, Abigail Adams.
ground_truth: 1969
sub_queries: Woodbury Langdon >> place of birth Answer: Portsmouth
When was Commander-in-Chief, Portsmouth abolished? Answer: 1969