razing to the ground of the castle. May 20 – Battle of Lincoln: Henry III's forces led by William Marshal, 1st Earl of Pembroke defeat the French army of Prince Louis and the rebel barons who are besieging Lincoln Castle. During the battle, Thomas, Comte du Perche is killed and Louis is expelled from his base in the southeast of England. The looting that takes place afterward is known as the "Lincoln Fair". The citizens of Lincoln are loyal to Louis so Henry's forces sack the city. To the south, inhabitants of towns between Lincoln and London ambush and kill many of the French soldiers. August 24 – Battle of Sandwich: An English fleet under Hubert de Burgh defeats the French armada (10 large ships and 70 supply ships) in the English Channel, near Sandwich. The French fleet is commanded by Eustace the Monk, a mercenary and pirate, who fights for both the French and English when it suits his needs. The French fleet is bringing more men and supplies to assist Prince Louis, in his quest to take the English throne. The English capture Eustace's flagship, and Eustace himself is (while offering 10,000 marks for ransom) beheaded. September 12 – Treaty of Kingston: The First Baron's War ends. After the defeat of the French fleet, Prince Louis is without hope of taking the English throne. William Marshall blockades London from the sea and land. At Lambeth Louis accepts peace terms. He waives his claim for the throne and promises to restore Normandy to Henry III but does not. The French and Scots are to leave England, and an amnesty is granted to the rebels. Europe April 9 – Peter II of Courtenay is crowned as emperor of the Latin Empire of Constantinople at Rome, by Pope Honorius III. Shortly after his coronation, Peter borrows some ships from the Venetians, promising in return to conquer Durazzo for them. He fails in this enterprise and seeks to make his way to Constantinople by land. On the journey, he is seized by troops of Theodore Komnenos Doukas, despot of Epirus, and is put in prison. June 6 – The 13-year-old King Henry I of Castile dies from the fall of a roof tile in Palencia, an event which his regent, Álvaro Núñez de Lara, attempts to conceal. He is succeeded by his sister Berengaria, who renounces the throne in favor of her