Nguyễn lordsThe Nguyễn lords (, 主阮; 1558–1777, 1780–1802), also known as the Nguyễn clan (阮氏, Nguyễn thị), were the rulers of southern Đại Việt during the Revival Lê dynasty and ancestors of Nguyễn dynasty's emperors. The territory they ruled was known contemporarily as Đàng Trong (Inner Realm) and by Europeans as Cochinchina, in opposition to the Trịnh lords ruling northern Đại Việt, known then as Đàng Ngoài (Outer Realm). Both Nguyễn and Trịnh lords were de jure subordinates of the Lê dynasty.
Vietnamese peopleThe Vietnamese people (người Việt , Việt people) or the Kinh people (người Kinh ), also recognized as the Viet people and informally the Viets, are a Southeast Asian ethnic group native to modern-day Northern Vietnam and Southern China (Jing Islands, Dongxing, Guangxi). The native language is Vietnamese, the most widely spoken Austroasiatic language. Vietnamese Kinh people account for just over 85.
Nam tiếnNam tiến (nam tǐən; 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 of Đại Việt from the 11th to the 19th centuries. The concept of Nam tiến has differing interpretations, with some equating it to Viet colonialism of the south and to a series of wars and conflicts between several Vietnamese kingdoms and Champa Kingdoms, which resulted in the annexation and Vietnamization of the former Cham states as well as indigenous territories.
Lê dynastyThe Lê dynasty, also known in historiography as the Later Lê dynasty (Hậu Lê triều, chữ Hán: 後黎朝 or nhà Hậu Lê, chữ Nôm: 茹後黎), officially Great Việt (Đại Việt; Chữ Hán: 大越), was the longest-ruling Vietnamese dynasty, having ruled from 1428 to 1789, with an interregnum between 1527 and 1533.
Ho Chi Minh CityHo Chi Minh City (abbreviated HCMC), commonly known as Saigon, is the most populous city in Vietnam, with a population of around 9.3 million in 2023. Situated in the Southeast region of Vietnam, the city surrounds the Saigon River and covers about . Saigon was the capital of French Indochina from 1887 to 1902, and again from 1945 until its cessation in 1954. Following the partition of French Indochina, it became the capital of South Vietnam until the fall of Saigon in 1975.
Nguyễn dynastyThe Nguyễn dynasty (chữ Nôm: 茹阮, Nhà Nguyễn; chữ Hán: 阮朝, Nguyễn triều) was the last Vietnamese dynasty, which was preceded by the Nguyễn lords and ruled the unified Vietnamese state independently from 1802 to 1883 before being under French protectorate. During its existence, the empire expanded into modern-day southern Vietnam, Cambodia, and Laos through a continuation of the centuries-long Nam tiến and Siamese–Vietnamese wars.
Sea level riseBetween 1901 and 2018, the average global sea level rose by , or an average of 1–2 mm per year. This rate accelerated to 4.62 mm/yr for the decade 2013–2022. Climate change due to human activities is the main cause. Between 1993 and 2018, thermal expansion of water accounted for 42% of sea level rise. Melting temperate glaciers accounted for 21%, with Greenland accounting for 15% and Antarctica 8%. Sea level rise lags changes in the Earth's temperature.
Effects of climate changeClimate change affects the physical environment, ecosystems and human societies. Changes in the climate system include an overall warming trend, more extreme weather and rising sea levels. These in turn impact nature and wildlife, as well as human settlements and societies. The effects of human-caused climate change are broad and far-reaching, especially if significant climate action is not taken. The projected and observed negative impacts of climate change are sometimes referred to as the climate crisis.
CambodiaCambodia (kæmˈboʊdiə) or Kampuchea (ˌkæmpʊˈtʃiːə; កម្ពុជា, UNGEGN: kampuciə), officially the Kingdom of Cambodia, is a country in the southern Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailand to the northwest, Laos to the north, Vietnam to the east, and the Gulf of Thailand to the southwest. The capital and largest city is Phnom Penh. Cambodia has been inhabited since prehistoric times. In 802 AD, Jayavarman II declared himself king, uniting the warring Khmer princes of Chenla under the name "Kambuja".
ChampaChampa (Cham: ꨌꩌꨛꨩ; ចាម្ប៉ា; Chiêm Thành 占城 or Chăm Pa 占婆) was a collection of independent Cham polities that extended across the coast of what is present-day central and southern Vietnam from approximately the 2nd century AD until 1832. According to earliest historical references found in ancient sources, the first Cham polities were established around the 2nd to 3rd centuries CE, in the wake of Khu Liên's rebellion against the rule of China's Eastern Han dynasty, and lasted until when the final remaining principality of Champa was annexed by Emperor Minh Mạng of the Vietnamese Nguyễn dynasty as part of the expansionist Nam tiến policy.
VietnamVietnam (Việt Nam, vîət nāːm), officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of and a population of over 100 million, making it the world's fifteenth-most populous country. Vietnam shares land borders with China to the north, and Laos and Cambodia to the west. It shares maritime borders with Thailand through the Gulf of Thailand, and the Philippines, Indonesia, and Malaysia through the South China Sea.
