Map of Europe after the Peace of Tilsit in 1807, from 'A Short History of...

The Treaties of Tilsit were two agreements signed by Napoleon I of France in the town of Tilsit in July, 1807 in the aftermath of his victory at Friedland. The first was signed on 7 July, between Tsar Alexander I of Russia and Napoleon. The second was signed with Prussia on 9 July. The treaties ended the War of the Fourth Coalition at the expense of the Prussian king, who had already agreed to a truce on 25 June after the Grande Armée had pursued him to the easternmost frontier of his realm, and in Tilsit ceded about half of his pre-war territories. From those territories, Napoleon had created French client states: the Kingdom of Westphalia, the Duchy of Warsaw and the Free City of Danzig; the other ceded territories were awarded to further French clients and to Russia.