The French Third Republic was the system of government adopted in France from 1870, when the Second French Empire collapsed during the Franco-Prussian War, until 10 July 1940 after France's defeat by Nazi Germany in World War II led to the formation of the Vichy government in France.

The early days of the Third Republic were dominated by political disruptions caused by the Franco-Prussian War of 1870–71, which the Republic continued to wage after the fall of Emperor Napoleon III in 1870.

The early governments of the Third Republic considered re-establishing the monarchy, but disagreement as to the nature of that monarchy and the rightful occupant of the throne could not be resolved. Consequently the Third Republic, originally foreseen as a provisional government, instead became the permanent form of government of France.

The Third Republic established many French colonial possessions, including French Indochina, French Madagascar, French Polynesia, and large territories in West Africa during the Scramble for Africa, all of them acquired during the last two decades of the 19th century.

More Info: en.wikipedia.org