1806 CE: Prussia declares war on France, sparking the War of the Fourth Coalition.

1806 CE: French Marshal Jean Lannes defeats the Prussians at the Battle of Saalfeld; Prince Louis Ferdinand of Prussia is killed.

1806 CE: The twin battles of Jena and Auerstedt result in the complete destruction of the Prussian army.

1806 CE: Napoleon's Grande Armée occupies Berlin, after less than a month of campaigning.

1806 CE: Napoleon issues the Berlin Decree, calling for a wide-scale embargo on British goods.

1806 CE: The Treaty of Posen is signed; Saxony leaves the Fourth Coalition and sides with Napoleon.

1806 CE: Napoleon enters Warsaw to great fanfare from the local Polish population, who expect him to restore Polish sovereignty.

1807 CE: The French and Russian armies fight the bloody, yet inconclusive, Battle of Eylau; both sides subsequently retreat into winter quarters.

1807 CE: The Prussian city of Danzig falls to French troops after a siege; as a reward, French Marshal Lefebvre is ennobled as "Duke of Danzig".

1807 CE: The Battle of Heilsberg results in a tactical Russian victory, as a French attack is hindered.

1807 CE: Napoleon decisively defeats Bennigsen's Russian army at the Battle of Friedland, leading Bennigsen to ask for an armistice.

1807 CE: Emperor Napoleon I of France and Tsar Alexander I of Russia meet on a raft in the Niemen River to discuss terms of peace.

1807 CE: The Treaties of Tilsit end the War of the Fourth Coalition; Prussia is subjugated to France, the Duchy of Warsaw is established in Poland, Russia becomes a French ally.