Vietnamese nationalism in the context of "August Revolution"

Nam tiến (Vietnamese: [nam tǐən]; chữ Hán: 南進; lit. "southward advance" or "march to the south") is a historiographical concept that describes the historic southward expansion of the territory of Vietnamese dynasties' dominions and ethnic Kinh people (Đại Việt) from the 11th to the 19th centuries. The concept of Nam tiến has differing interpretations, with some equating it to Vietnamese colonization of the south and to a series of wars and conflicts between several Vietnamese dynasties and Champa Kingdoms, which resulted in the annexation and Vietnamization of the former Cham states as well as indigenous territories. The nam tiến became one of the dominant themes of the narrative that Vietnamese nationalists created in the 20th century, alongside an emphasis on non-Chinese origin and Vietnamese homogeneity. Within Vietnamese nationalism and Greater Vietnam ideology, it served as a romanticized conceptualization of the Vietnamese identity, especially in South Vietnam and modern Vietnam.

The Vietnamese domain gradually expanded from its original heartland in the Red River Delta into southern territories, which were controlled by the Champa kingdoms. In a span of some 700 years, the Vietnamese domain tripled the area of its territory and more or less acquired the elongated shape of modern-day Vietnam. Beginning in the 20th century, modern Vietnamese historiography, under the auspices of nationalism and racialism, coined the term Nam tiến for what they believed to be a gradual, inevitable southern expansion of Vietnamese domains. According to the 20th-century Vietnamese scholars who constructed the Nam tiến as a continuous historical phenomenon, the 11th to the 14th centuries saw battle gains and losses as frontier territory changed hands between the Viet and the Chams during the early Cham–Viet wars. In the 15th, 16th and 17th centuries, following the Fourth Chinese domination of Vietnam (1407–1427), the Vietnamese defeated the less centralized state of Champa and seized its capital in the 1471 Cham–Vietnamese War. From the 17th to the 19th centuries, Vietnamese settlers penetrated the Mekong Delta. The Nguyễn lords of Huế wrested the southernmost territory from Cambodia by diplomacy and by force, which completed the "March to the South".

The Việt Nam Quốc Dân Đảng (Vietnamese: [vìət naːm kwə́wk zən ɗa᷉ːŋ]; chữ Hán: 越南國民黨; lit. 'Vietnamese Nationals' Party'), also known as the Vietnamese Nationalist Party and abbreviated VNQDĐ or Việt Quốc, was a nationalist and democratic socialist political party that sought independence from French colonial rule in Vietnam during the early 20th century. Its origins lie in a group of young Hanoi-based intellectuals who began publishing revolutionary material in the mid-1920s. In 1927, after the publishing house failed because of French harassment and censorship, the VNQDĐ was formed under the leadership of Nguyễn Thái Học. Modelling itself on the Kuomintang of Nationalist China (chữ Hán: 國民黨) the VNQDĐ gained a small following among northerners, particularly teachers and intellectuals. The party, which was less successful among peasants and industrial workers, and was organised in small clandestine cells.

From 1928, the VNQDĐ attracted attention through its assassinations of French officials and Vietnamese collaborators. A turning point came in February 1929 with the Bazin assassination, the killing of a French labour recruiter widely despised by local Vietnamese people. Although the perpetrators' precise affiliation was unclear, the French colonial authorities held the VNQDĐ responsible. Between 300 and 400 of the party's approximately 1,500 members were detained in the resulting crackdown. Many of the leaders were arrested, but Học managed to escape.

During the aftermath of World War II and the Cold War, the Indochina wars (Vietnamese: Chiến tranh Đông Dương) were a series of wars which were waged in Indochina from 1945 to 1991, by communist forces (mainly ones led by Vietnamese communists) against the opponents (mainly the Vietnamese nationalists, Trotskyists, the State of Vietnam, the Republic of Vietnam, the French, American, Laotian royalist, Cambodian and Chinese communist forces). The term "Indochina" referred to former French Indochina, which included the current states of Vietnam, Laos, and Cambodia. In current usage, it applies largely to a geographic region, rather than to a political area. The wars included:

• The First Indochina War (called the Indochina War in France and the French War in Vietnam) began after the end of World War II with the War in southern Vietnam (1945–1946), which acted as the precursor to the First Indochina War. The conflict officially began in 1946 and lasted until the French defeat in 1954. After a long campaign of unsuccessful resistance against the French and the Japanese, Viet Minh forces claimed a victory in the August Revolution after Japanese forces surrendered to the Allies on 15 August 1945, leading to the fall of the Empire of Vietnam and Nguyễn dynasty. In the War in southern Vietnam (1945–1946), British forces temporarily occupied the South with the objective of disarming Japanese forces, starting from 13 September 1945, only to restore French colonial control in 1946. Meanwhile, the communist Viet Minh sought to consolidate power by terrorizing and purging rival Vietnamese nationalist groups and Trotskyist activists. In the United Nations, and through their alliance with the United Kingdom and the United States, the French demanded return of their former Indochina colony prior to agreeing to participate in the NATO alliance (founded in 1949) opposing Soviet expansion beyond the countries of the Warsaw Pact (founded in 1955) in the Cold War. With support from China and the Soviet Union, the communist Viet Minh continued fighting the French Union, including the anti-communist State of Vietnam, ultimately forcing the NATO-backed French out of North Vietnam as a result of 1954 Geneva Conference.
• The Second Indochina War (called the Vietnam War in the United States and the Anti-American War by North Vietnam) began as a conflict between the United States-backed South Vietnamese government and its opponents, both the North Vietnamese-based communist Viet Cong (National Liberation Front) and the People's Army of Vietnam (PAVN), known in the West as the North Vietnamese Army (NVA). The conflict began in 1955 and lasted until 1975 when the North Vietnamese army conquered South Vietnam. The United States, which had supported France and its native vassal during the First Indochina war, backed the Republic of Vietnam government in opposition to the communist Viet Cong and PAVN. The North benefited from military and financial support from China and the Soviet Union, members of the communist bloc, Fighting also occurred during this time in Cambodia between the US-backed government, the PAVN, and the communist-backed Khmer Rouge, which also fought alongside deposed King Sihanouk's government in exile (known as the Cambodian Civil War, 1967–1975) and in Laos between the US-backed government, the PAVN, and the communist-backed Pathet Lao (known as the Laotian Civil War or Secret War, 1959–1975).
• The Third Indochina War was a period of prolonged conflict following the Second Indochina War. The conflict began in 1978 and lasted until the 1991 Paris Peace Agreements on 23 October 1991, in which several wars were fought:

Ngô Đình Diệm (/djɛm/ dyem, /ˈjiːəm/ YEE-əm or /ziːm/ zeem; Vietnamese: [ŋō ɗìn jîəmˀ] ; 3 January 1901 – 2 November 1963) was a South Vietnamese politician who was the final prime minister of the State of Vietnam (1954–1955) and later the first president of South Vietnam (Republic of Vietnam) from 1955 until his capture and assassination during the CIA-backed 1963 coup d'état.

Diệm was born into a prominent Catholic family with his father, Ngô Đình Khả, being a high-ranking mandarin for Emperor Thành Thái during the French colonial era. Diệm was educated at French-speaking schools and considered following his brother Ngô Đình Thục into the priesthood, but eventually chose to pursue a career in the civil service. He progressed rapidly in the court of Emperor Bảo Đại, becoming governor of Bình Thuận Province in 1929 and interior minister in 1933. However, he resigned from the latter position after three months and publicly denounced the emperor as a tool of France. Diệm came to support Vietnamese nationalism, promoting both anti-communism, in opposition to Ho Chi Minh, and decolonization, in opposition to Bảo Đại. He established the Cần Lao Party to support his political doctrine of Person Dignity Theory, which was a blend of the philosophies of Personalism, especially as understood by French philosopher Emmanuel Mounier, and of Confucianism, which Diệm and his father had greatly admired. Diệm supported the Confucian concept of "Mandate of Heaven", and wished to make it the basis of political theory that would emerge in Vietnam.

Civil conflicts in Vietnam were series of political violence and civil war which took place soon after the end of World War II. It lasted from the August Revolution in 1945 until the establishment of the State of Vietnam in 1949, during which the communist-led Viet Minh suppressed and terrorized both nationalist and Trotskyist groups. According to David G. Marr, it was an era of hatred, betrayal, and murder.