ambushed and defeated by Welsh troops at Llandeilo. English expansion into southern Wales is halted. June 26 – King Denis I (the Poet King) marries the 11-year-old Elizabeth of Aragon, daughter of Peter III (the Great), in Trancoso. Elizabeth received the towns of Óbidos, Abrantes, and Porto de Mós as part of her dowry. Denis, known for his poetry, writes several poems and books himself, with topics of administration and hunting. During his reign, Lisbon becomes one of Europe's centers of art and culture. July – Alfonso X (the Wise) allies himself with Abu Yusuf Yaqub ibn Abd al-Haqq, ruler of the Marinid Sultanate, who crosses the straits, and establishes a camp at Zahara de la Sierra, in southern Spain. Alfonso offers the Castilian royal crown of his father and grandfathers as a pledge of re-payment of a loan. Out of pity, Abu Yusuf gives him 100,000 gold dinars. August – Castilian forces under Sancho lay siege to Badajoz, who eventually retreat as the combined armies of Alfonso X (the Wise) relieve the city. Shortly after, Alfonso marches to Córdoba and demands the key of the city. This is refused by Diego López V de Haro, speaking on behalf of the magnates. Meanwhile, the Marinids plunder the Guadalquivir valley. August 30 – Peter III (the Great) traveling with his fleet on a military expedition against Tunis, ends up in the Sicilian town of Trapani, after he was asked by the inhabitants of Palermo to help in the fight against Charles I. September 4 – Peter III (the Great) is proclaimed "King of Sicily". Charles is forced to flee across the Strait of Messina, only to be content with the Kingdom of Naples (ruling a part of the Italian Peninsula with Martin IV). September or October – Battle of Lake Hód: Hungarian forces led by King Ladislaus IV successfully repel and defeat an invading Cuman army. Ladislaus receives the title "the Cuman" for his heroic victory. November – Castilian forces under Alfonso X (the Wise) reconquer Córdoba. Pope Martin IV issues a papal bull, forcing Sancho and his nobles to proclaim their allegiance to Alfonso. Ending the rebellion. November 6 – Battle of Moel-y-don: English forces led by Luke de Tany are ambushed and defeated by Welsh troops, while crossing over a floating bridge to the island of Anglesey. December 11 – Battle of Orewin Bridge: English forces (some 6,000 men)