What was the name of the 1860 trade treaty between France and the United Kingdom?

The 1860 trade treaty between France and the United Kingdom was the Cobden-Chevalier Treaty.

Signed on 23 January 1860, the agreement was negotiated by British free-trader Richard Cobden and French economist Michel Chevalier during the reigns of Queen Victoria and Napoleon III. It reduced tariffs on major goods, including French wine and brandy and British coal, iron, and manufactured products.

Britain had already moved toward free trade after the repeal of the Corn Laws in 1846, while France remained more protectionist. The treaty therefore represented a major change in French commercial policy and helped stimulate a wider network of European trade agreements based on most-favoured-nation treatment.

A common mix-up is calling it simply the “Anglo-French Commercial Treaty.” That description is understandable, but Cobden-Chevalier Treaty is the established name. France later abandoned the agreement in 1892 when the Méline tariff restored stronger protectionism.