This is a question that is answered differently depending on political orientation.
According to the Vietnamese, the first colonizers of Vietnam were the Chinese who attempted to integrate Vietnam into China at several points over the last 2000 years. (Of course, the Chinese argue that Vietnam was a province of China that managed to break away from Chinese control in fits and starts.)
Outside of Vietnam, especially in the West, the colonization of Indochina (which included Vietnam) under the French is considered the first colonization of Vietnam. They disqualify the Chinese invasions either because the Chinese Occupation was distinct from colonization as it would be practiced in the Imperialist Period or because of the Euro-centric idea that only Western countries can colonize.
Vietnam was part of an area known as French Indochina from the 1800s until 1954. So it was considered a French colony during those years.
Indochina was prominently colonized and influenced by the French, but their historic rivals (the British) also pushed through in the south from their colonial stronghold in northern India.
kfc
colonized by french and invaded by mongolions
Britain colonized zimbabwe.
France colonized Vietnam.
Several European nations colonized America. Spain colonized Florida and parts of the Southwest. England colonized the East Coast and further inland. France colonized the Mississippi River area. The Netherlands colonized the area around New York, but were driven out by England. Russian colonized Alaska.
France.
Indochina Indochina
French Indochina.
Japan .
Thailand/Siam was the only country in Southeast Asia to have never been colonized.
colonized by french and invaded by mongolions
France was the country that once ruled Indochina.
The country that colonized Chile was Spain
France ruled it, and this is why it was called "French" Indochina.
Spain is the European country that colonized Panama.
Spain was the European country that colonized Venezuela.
The French colonized Cambodia.
The country that originally colonized the state of Florida was the Spanish.