Existence as a separate entity began with the Treaty of Verdun (843) , with the division of Charlemagne's Carolingian empire into East Francia, Middle Francia and Western Francia. Western Francia approximated the area occupied by modern France and was the precursor to modern France.

The Carolingians ruled France until 987, when Hugh Capet, Duke of France and Count of Paris, was crowned King of France. His descendants, the Direct Capetians, the House of Valois and the House of Bourbon, progressively unified the country through a series of wars and dynastic inheritance. The monarchy reached its height during the 17th century and the reign of Louis XIV. At this time France possessed the largest population in Europe (see Demographics of France) and had tremendous influence over European politics, economy, and culture. French became, and remained for some time, the common language of diplomacy in International affairs. Much of the Enlightenment occurred in French intellectual circles, and major scientific breakthroughs were achieved by French scientists in the 18th century. In addition, France obtained many overseas possessions in the Americas, Africa and Asia.