Question: Where was the capitol before the city Văn Tiến Dũng was born in?

full_context: Document 1: Auguste Henri Vildieu: Auguste Henri Vildieu was the French architectural adjutant in Hanoi while that city was an administrative center for the French colony of Indochina. Vildieu constructed several grand European-style buildings for the colonial government, including:
Document 2: Văn Tiến Dũng: Văn Tiến Dũng (; 2 May 1917 – 17 March 2002), born Co Nhue commune, Từ Liêm District, Hanoi, was a Vietnamese general in the People's Army of Vietnam (PAVN), PAVN chief of staff (1954–74); PAVN commander in chief (1974–80); member of the Central Military–Party Committee (CMPC) (1984-1986) and Socialist Republic of Vietnam defense minister (1980–86).
Document 3: Geography of Vietnam: Vietnam is located on the eastern margin of the Indochinese peninsula and occupies about 331,211.6 square kilometers, of which about 25% was under cultivation in 1987. It borders the Gulf of Thailand, Gulf of Tonkin, and Pacific Sea, alongside China, Laos, and Cambodia. The S - shaped country has a north - to - south distance of 1,650 kilometers and is about 50 kilometers wide at the narrowest point. With a coastline of 3,260 kilometers, excluding islands, Vietnam claims 12 nautical miles (22.2 km; 13.8 mi) as the limit of its territorial waters, an additional 12 nautical miles (22.2 km; 13.8 mi) as a contiguous customs and security zone, and 200 nautical miles (370.4 km; 230.2 mi) as an exclusive economic zone.
Document 4: History of Vietnam: After Quang Trung's death, the Tây Sơn dynasty became unstable as the remaining brothers fought against each other and against the people who were loyal to Nguyễn Huệ's infant son. Nguyễn Ánh sailed north in 1799, capturing Tây Sơn's stronghold Qui Nhơn. In 1801, his force took Phú Xuân, the Tây Sơn capital. Nguyễn Ánh finally won the war in 1802, when he sieged Thăng Long (Hanoi) and executed Nguyễn Huệ's son, Nguyễn Quang Toản, along with many Tây Sơn generals and officials. Nguyễn Ánh ascended the throne and called himself Emperor Gia Long. Gia is for Gia Định, the old name of Saigon; Long is for Thăng Long, the old name of Hanoi. Hence Gia Long implied the unification of the country. The Nguyễn dynasty lasted until Bảo Đại's abdication in 1945. As China for centuries had referred to Đại Việt as Annam, Gia Long asked the Manchu Qing emperor to rename the country, from Annam to Nam Việt. To prevent any confusion of Gia Long's kingdom with Triệu Đà's ancient kingdom, the Manchu emperor reversed the order of the two words to Việt Nam. The name Vietnam is thus known to be used since Emperor Gia Long's reign. Recently historians have found that this name had existed in older books in which Vietnamese referred to their country as Vietnam.
Document 5: Đông Anh District: Đông Anh is a rural district ("huyện") of Hanoi, the capital city of Vietnam. Nguyen Phu Trong, current General Secretary of Vietnam since 2011, was born there on 14 April 1944.
Document 6: France–Vietnam relations: French -- Vietnamese relations started as early as the 17th century with the mission of the Jesuit father Alexandre de Rhodes. Various traders would visit Vietnam during the 18th century, until the major involvement of French forces under Pigneau de Béhaine from 1787 to 1789 helped establish the Nguyễn Dynasty. France was heavily involved in Vietnam in the 19th century under the pretext of protecting the work of Catholic missionaries in the country. France progressively carved for itself a huge colony, which would form French Indochina in 1887. France continued to rule Vietnam as a colony until France's defeat in the First Indochina War and the proclamation of Vietnam's independence in 1954.
Document 7: Nguyễn Huy Hiệu: Colonel General Nguyễn Huy Hiệu (born 1947) is an officer of the Vietnam People's Army and current Deputy Minister of Defence of Vietnam. Enlisted in 1965, Nguyễn Huy Hiệu fought in various battlefields during Vietnam War, especially the Battle of Quảng Trị where he was appointed commander of battalion at the age of 23. Nguyễn Huy Hiệu began to hold the position of Deputy Minister of Defence in 1994.
Document 8: Ho Chi Minh City: Ho Chi Minh City Thành phố Hồ Chí Minh Saigon or Sài Gòn Municipality Thành phố trực thuộc trung ương Clockwise, from left to right: Bến Thành Market, Ho Chi Minh City Hall, District 1 view from Saigon river, Municipal Theatre, Notre - Dame Cathedral Basilica of Saigon, Independence Palace Seal Nickname (s): Pearl of the Far East Location in Vietnam and Southern Vietnam Coordinates: 10 ° 46 ′ 36.8 ''N 106 ° 42 ′ 02.9'' E ﻿ / ﻿ 10.776889 ° N 106.700806 ° E ﻿ / 10.776889; 106.700806 Coordinates: 10 ° 46 ′ 36.8 ''N 106 ° 42 ′ 02.9'' E ﻿ / ﻿ 10.776889 ° N 106.700806 ° E ﻿ / 10.776889; 106.700806 Country Vietnam Central district District 1 Founded as Gia Định 1698 Renamed to Ho Chi Minh City 1976 Founded by Nguyễn Hữu Cảnh Divisions 19 Urban districts, 5 Suburban districts Government Type Special - class Secretary of Communist Party Nguyễn Thiện Nhân Chairman of People's Committee Nguyễn Thành Phong Chairman of People's Council Nguyễn Thị Quyết Tâm Area Total 2,096.56 km (809.23 sq mi) Elevation 19 m (63 ft) Population (2016) Total 8,426,100 Rank 1st Density 4,000 / km (10,000 / sq mi) GDP (PPP) (2015 estimate) Total US $127.8 billion Per capita US $15,977 GRDP (nominal) (2016) Total US $45.73 billion Per capita US $5,428 Time zone ICT (UTC + 07: 00) Area codes 8 (until 16 Jul 2017) 28 (from 17 Jun 2017) Website hochiminhcity.gov.vn
Document 9: Đăng Văn Quang: Lieutenant General Đăng Văn Quang (June 21, 1929 – July 15, 2011) was an officer of the Army of the Republic of Vietnam who served as a Minister of Defense under President Nguyễn Văn Thiệu of South Vietnam.
Document 10: French Indochina: A grouping of the three Vietnamese regions of Tonkin (north), Annam (centre), and Cochinchina (south) with Cambodia was formed in 1887. Laos was added in 1893 and the leased Chinese territory of Guangzhouwan in 1898. The capital was moved from Saigon (in Cochinchina) to Hanoi (Tonkin) in 1902 and again to Da Lat (Annam) in 1939. In 1945 it was moved back to Hanoi.
Document 11: North Vietnam: After about 300 years of partition by feudal dynasties, Vietnam was again under one single authority in 1802 when Gia Long founded the Nguyễn dynasty, but the country became a French protectorate after 1883 and under Japanese occupation after 1940 during World War II. Soon after Japan surrendered on September 2, 1945, the Việt Minh in the August Revolution entered Hanoi, and the Democratic Republic of Vietnam was proclaimed on September 2, 1945: a government for the entire country, replacing the Nguyễn dynasty. Hồ Chí Minh became leader of the Democratic Republic of Vietnam. U.S. President Franklin Roosevelt had spoken against French rule in Indochina, and U.S.A. was supportive of the Viet Minh at this time.
Document 12: Leaders of the Vietnam War: Ho Chi Minh was the key figure and held the main leadership of North Vietnam during both wars in the country. He remained as a great source of inspiration for the Vietnamese who were fighting for a united Vietnam as in his wish after he officially stepped aside in 1965 and even after his death in 1969. The final offensive against Saigon -- the capital of South Vietnam in 1975 was named after him (the Ho Chi Minh Campaign). Vietnam was reunified under the Communist rule after the fall of Saigon in April 1975, nearly 30 years after Ho's declaration of independence and 6 years after his death. Soon after that, Saigon was renamed Ho Chi Minh city in honour of his vast contributions to Vietnam.
Document 13: 3rd Military Region (Vietnam People's Army): The 3rd Military Region of Vietnam People's Army, is directly under the Ministry of Defence of Vietnam, tasked to organise, build, manage and commander armed forces defending the Red River Delta. The north-West region of Vietnam, borders with the Guangxi of China. In 1979, Chinese army with one infantry division, launched an invasion in this military zone.
Document 14: Leaders of the Vietnam War: Ho Chi Minh whose real name is Nguyen Sinh Cung and also known as Nguyen Tat Thanh and Nguyen Ai Quoc was a Vietnamese revolutionary leader following the path of communism.
Document 15: Nguyễn Văn Vy: Nguyễn Văn Vy (16 January 1916 – 1981) was a Vietnamese soldier who rose to the rank of lieutenant general in the Army of the Republic of Vietnam (ARVN).
ground_truth: Saigon
sub_queries: What is the name of the city Văn Tiến Dũng was born in? Answer: Hanoi
Where was the capital before Hanoi ? Answer: Saigon