The French Third Republic (French: Troisième République, sometimes written as La III République) was the system of government adopted in France from 4 September 1870, when the Second French Empire collapsed during the Franco-Prussian War, until 10 July 1940, after the Fall of France during World War II led to the formation of the Vichy government. The French Third Republic was a parliamentary republic.
The early days of the French Third Republic were dominated by political disruption caused by the Franco-Prussian War of 1870–1871, which the Third Republic continued to wage after the fall of Emperor Napoleon III in 1870. Social upheaval and the Paris Commune preceded the final defeat. The German Empire, proclaimed by the invaders in Palace of Versailles, annexed the French regions of Alsace (keeping the Territoire de Belfort) and Lorraine (the northeastern part, i.e. present-day department of Moselle). The early governments of the French 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 envisioned as a provisional government, instead became the permanent form of government of France.