along the outer walls, professing their Catholic faith. Nevertheless, the Crusaders breach and sack the city, killing many. Winter – Innocent III excommunicates the Crusader army, along with the Venetians, who winter at Zadar. Many Crusaders, including some senior men, either abandon the Fourth Crusade or make their own way to the Holy Land. However, the majority remain in Zadar, where the army receives some welcomed reinforcements. During the winter, negotiations continue with Alexios Angelos. Europe Spring – King Philip II (Augustus) summons King John (Lackland) to Paris to answer his charges against the Lusignans. On April 28, failing to attend Philip's court, John is declared to be a 'rebel' and to have forfeited the areas of Aquitaine, Poitou and Anjou. Philip tries to mediate the political problems between John and the Lusignans (who are charged with treason) but this is ignored by John. The lands are given to Arthur of Brittany. Philip supports Arthur's claim to the English throne and betrothes his 4-year-old daughter Marie. August 1 – Battle of Mirebeau: Arthur of Brittany, supported by the Lusignans, lays siege to Mirebeau Castle trapping Eleanor of Aquitaine inside. John launches a rescue mission to free his mother, and with a mercenary army defeats the Breton-Lusignan forces. Arthur is captured by William de Braose and is handed over to John who imprisons him in the Château de Falaise in Normandy. Many other important knights are captured and shipped to England (where John treats them badly and keeps them as prisoners in dungeons). July 27 – Battle of Basian: Seljuk forces (some 150,000 men) under Suleiman II of Rûm advance toward the Georgian border and are met by a 65,000-strong army led by King David Soslan, husband of Queen Tamar of Georgia at Basian. The Georgians assail the enemy's camp and in a pitched battle, the Seljuk forces are overwhelmed and defeated. The loss of the sultan's banner (while Suleiman himself is wounded), results in panic within the Seljuk ranks. The victory at Basian secures the Georgian preeminence in the region. The Livonian Brothers of the Sword is founded by Bishop Albert of Riga, this to support the Livonian Crusade against the inhabitants in Medieval Livonia. Danish forces make a Crusade to Finland, which is led by Anders Sunesen, archbishop of Lund, and his brother. The Almohad fleet expels the Banu Ghaniya from the Balearic Islands. Middle East May 20 –