Question: When was the office of Commander-in-Chief abolished in the city where Michelle Magorian was born?

full_context: Document 1: 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 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: Christian Magdu: A recognizable name and face in Sweden, Christian started working as an actor straight out of high school in the touring play ""Europe 1697"". Even though he studied sciences in high school it was the liberal arts and most of all theater, that was his great passion. He attended two famous, Swedish theater conservatories - Wendelsberg in 1998 and the highly prestigious, highly competitive Skara Skolscen in 2000. Christian describes Skara Skolscen as his most valuable time evolving as a new actor.
Document 4: 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 5: 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 6: Michelle Bitting: Bitting grew up in Pacific Palisades. studied theater at the University of California, Berkeley and pursued careers in dance and culinary arts before turning her focus to writing in 2001. She received an MFA in writing and poetry from Pacific University, Oregon in 2009. She holds an MFA in creative writing from Pacific University, Oregon. She is a PhD candidate in mythological studies at Pacifica Graduate Institute.
Document 7: Marte Michelet: She is the daughter of novelist and politician Jon Michelet and Toril Brekke. They resided in Lindeberg, Oslo before her parents split up. Marte Michelet moved into an apartment in Oslo, that once had housed a young Jewish girl who was deported to Auschwitz.
Document 8: 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 9: John Abineri: Born in London, he attended the Old Vic drama school and described himself as "Well educated from the age of five to eighteen". He spoke a number of languages (including German, Russian and French) fluently, which led to him being cast as a number of different nationalities.
Document 10: Michelle Magorian: Michelle Magorian was born in Portsmouth, Hampshire, and is of Armenian origin. She lived in Singapore and Australia from age seven to nine. As a child she spent as much time as possible in the King's Theatre in Portsmouth and her ambition was to become an actress. After three years of study at the Rose Bruford College of Speech and Drama, she spent two years at Marcel Marceau's L'école Internationale de Mime in Paris. From there she launched into a professional acting career and spent a few years touring all over the country - from Scotland to Devon and then Yorkshire - working in repertory companies, taking any part she could. Michelle's worst stage part was playing Orinoco in "The Wombles" musical. All this time she had been secretly writing stories. When she was 24 she became interested in children's books, and decided to write one herself.
Document 11: Verna Aardema: In her senior year at Michigan State, Norberg won three writing contests; although not her first, they were the most influential in her decision to pursue the childhood dream. She first considered writing for children when her daughter refused to eat until she'd heard one of her mother's stories. These bribes were often set in the places that she had been reading about recently, and as she became more and more interested in Africa, they began to be set there more frequently.
Document 12: Audrey Cruddas: Born in Johannesburg, South Africa, Cruddas moved to England with her parents when she was an infant. After leaving school she studied art at St John's Wood School of Art, Royal Academy Schools, and Bram Shaw School of Drawing and Painting. During the Second World War, she worked as a 'Land Girl' in the Women's Land Army. At the end of the conflict she began to design costumes for the theatre and was quickly talent spotted by the dancer and actor Sir Robert Helpmann. Cruddas soon became one of the leading modern theatre designers of the post war period.
Document 13: 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 14: 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 15: Ania Walwicz: Ania Walwicz was born in Swidnica, Poland where she spent her childhood, before migrating to Australia in 1963. She attended the Victorian College of the Arts (VCA) in Melbourne. Her writing tends toward an impressionistic, stream of consciousness exploration of inner states. It also exploits 'appropriative' or 'sampling' techniques of production. Apart from publication in numerous anthologies, journals and several books her work has been performed by La Mama Theatre, the Sydney Chamber Choir and more recently set to music by ChamberMade. She has performed her work in France, Japan and Switzerland and currently teaches creative writing at RMIT in Melbourne.
ground_truth: 1969
sub_queries: What is the place of birth of Michelle Magorian? Answer: Portsmouth
When was Commander-in-Chief, Portsmouth abolished? Answer: 1969