8th March » The Siege of Château Gaillard ends in a French victory over King John, King of England called John of England, who loses control of Normandy to King Philip II of France e.g Philip II Augustus.
12th April » The Crusaders of the Fourth Crusade breach the walls of Constantinople and Siege of Constantinople (1204) or enter the city, which they completely occupy the following day.
13th April » Constantinople falls to the Crusaders of the Fourth Crusade, temporarily ending the Byzantine Empire.
16th May » Baldwin I of Constantinople e.g Baldwin IX, Count of Flanders is crowned as the first Emperor of the Latin Empire.