The history of France from 1789 to 1914 (the long 19th century) extends from the French Revolution to World War I and includes:
At the time of the French Revolution, France had expanded to nearly the modern territorial limits. The 19th century would complete the process by the annexation of the Duchy of Savoy and the city of Nice (first during the First Empire, and then definitively in 1860) and some small papal (like Avignon) and foreign possessions. France's territorial limits were greatly extended during the Empire through Revolutionary and Napoleonic military conquests and re-organization of Europe, but these were reversed by the Vienna Congress. Savoy and the Nice were definitively annexed following France's victory in the Franco-Austrian War in 1859.
In 1830, France invaded Algeria, and in 1848 this north African country was fully integrated into France as a département. The late 19th century saw France embark on a massive program of overseas imperialism — including French Indochina (modern day Cambodia, Vietnam and Laos) and Africa (the Scramble for Africa brought France most of North-West and Central Africa) — which brought it in direct competition with British interests.
With the French defeat in the Franco-Prussian War of 1870, France lost her provinces of Alsace and portions of Lorraine to Germany (see Alsace-Lorraine); these lost provinces would only be regained at the end of World War I.