Question: who was the first imperial power that was fighting in vietnam
[{'answer': 'France'}, {'provenance': [{'wikipedia_id': '80356', 'title': 'History of Vietnam', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12895911342616021268}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '80356', 'title': 'History of Vietnam', 'start_paragraph_id': 102, 'start_character': 0, 'end_paragraph_id': 102, 'end_character': 1870, 'bleu_score': 0.9846454718158941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12895911342616021268}, 'section': 'Section::::Modern period (1858–present).:Republican era (1945–present).:Warring era (1945–76).\n'}]}, {'provenance': [{'wikipedia_id': '80356', 'title': 'History of Vietnam', 'section': 'Section::::Modern period (1858–present).:Republican era (1945–present).:Warring era (1945–76).\n', 'start_paragraph_id': 102, 'end_paragraph_id': 102, 'meta': {'evidence_span': ["Full-scale war broke out between the Vit Minh and France in late 1946 and the First Indochina War officially began. Realizing that colonialism was coming to an end worldwide, France decided to bring former emperor Bo Đi back to power, as a political alternative to Ho Chi Minh. A Provisional Central Government was formed in 1948, reuniting Annam and Tonkin, but the complete reunification of Vietnam was delayed for a year because of the problems posed by Cochinchina's legal status. In July 1949, the State of Vietnam was officially proclaimed, as a semi-independent country within the French Union, with Bo Đi as Head of State", "Realizing that colonialism was coming to an end worldwide, France decided to bring former emperor Bo Đi back to power, as a political alternative to Ho Chi Minh. A Provisional Central Government was formed in 1948, reuniting Annam and Tonkin, but the complete reunification of Vietnam was delayed for a year because of the problems posed by Cochinchina's legal status. In July 1949, the State of Vietnam was officially proclaimed, as a semi-independent country within the French Union, with Bo Đi as Head of State. France was finally persuaded to relinquish its colonies in Indochina in 1954 when Viet Minh forces defeated the French at Dien Bien Phu."]}}]}, {'provenance': [{'wikipedia_id': '34976514', 'title': 'History of Vietnam since 1945', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ["After World War II and the collapse of Vietnam's monarchy, France attempted to re-establish its colonial rule but was ultimately defeated in the First Indo-China War. The Geneva Accords in 1954 partitioned the country temporarily in two with a promise of democratic elections in 1956 to reunite the country. However, the United States and South Vietnam insisted on United Nations supervision of any election to prevent fraud, which the Soviet Union and North Vietnam refused. North and South Vietnam therefore remained divided until The Vietnam War ended with the Fall of Saigon in 1975.", 'France attempted to re-establish its colonial rule but was ultimately defeated in the First Indo-China War.', "After World War II and the collapse of Vietnam's monarchy, France attempted to re-establish its colonial rule but was ultimately defeated in the First Indo-China War."]}}]}, {'provenance': [{'wikipedia_id': '222928', 'title': 'First Indochina War', 'section': 'Section::::Timeline.:1947.\n', 'start_paragraph_id': 33, 'end_paragraph_id': 33, 'meta': {'evidence_span': ['In 1948, France started looking for means of opposing the Vit Minh politically, with an alternative government in Saigon. They began negotiations with the former emperor Bo Đi to lead an "autonomous" government within the French Union of nations, the State of Vietnam.', 'The French sent military expeditions to attack his bases, but Giap refused to meet them head-on in battle. Wherever the French troops went, the Vit Minh disappeared. Late in the year the French launched Operation Lea to take out the Vit Minh communications center at Bc Kn. They failed to capture H Chí Minh and his key lieutenants as intended. The French claimed 9,000 Vit Minh soldiers KIA during the campaign which, if true, would represent a major blow for the insurgency. In 1948, France started looking for means of opposing the Vit Minh politically, with an alternative government in Saigon. They began negotiations with the former emperor Bo Đi to lead an "autonomous" government within the French Union of nations, the State of Vietnam']}}]}]