Maes Moydog: English forces led by William de Beauchamp defeat the Welsh rebels (some 700 men), near the modern-day town of Llanfair Caereinion, in Wales. In a night attack on the Welsh infantry, William uses cavalry to drive them into compact formations, which are then shot up by his archers. Madog ap Llywelyn, proclaimed "Prince of Wales", and the remnants of his army are routed and retreat across the Banwy River, in which many drown. November 13 – King Edward I (Longshanks) summons the Model Parliament to Westminster, the composition of which serves as a model for later parliaments. The parliament agrees that a tax can be raised to allow him to launch campaigns against France and the rebellious Scots for the forthcoming year. Construction begins on Beaumaris Castle in Anglesey under the direction of James of St. George. It is built as part of the conquest of Wales by Edward I. Asia October 4 – Mongol leader Baydu Khan is executed after a 7-month reign at Tabriz. He is succeeded by Ghazan Khan, who becomes ruler of the Ilkhanate. He converts to Islam, ending a line of Tantric Buddhist leaders. King Jayavarman VIII is overthrown after a 52-year reign. He is succeeded by his son-in-law Indravarman III as ruler of the Khmer Empire (modern Cambodia). Births March 21 – Henry Suso, German priest, mystic and writer (d. 1366) September 16 – Elizabeth de Clare, English noblewoman (d. 1360) Catherine of Austria, German noblewoman and princess (d. 1323) Egill Eyjólfsson, Icelandic deacon, scholar and bishop (d. 1341) Giovanni Colonna, Italian cardinal (House of Colonna) (d. 1348) Hōjō Moritoki, Japanese nobleman and regent (shikken) (d. 1333) Joanna of Flanders, Flemish noblewoman and regent (d. 1374) John III, French nobleman and knight (House of Dreux) (d. 1331) John of Montfort, French nobleman (House of Montfort) (d. 1345) Juan Alfonso de la Cerda, French nobleman and knight (d. 1347) Margaret of Valois, French noblewoman and princess (d. 1342) Nicephorus Gregoras, Byzantine historian and writer (d. 1360) Nijō Tameakira, Japanese nobleman and waka poet (d. 1364) Odo IV (or Eudes IV), French nobleman and knight (d. 1349) Reginald II (the Black), Dutch nobleman and regent (d. 1343) Reynold Cobham, English nobleman and diplomat (d. 1361) Robert de Eglesfield, English nobleman and chaplain (d. 1349) Takatsukasa Fuyunori, Japanese nobleman and regent (d. 1337) Vitalis of Assisi, Italian Benedictine monk and hermit (d. 1370) Deaths January