April 22 - The first of the Statutes of Westminster are passed by the Englishparliament, establishing a series of laws in its 51 clauses, including equal treatment of rich and poor, free and fair elections, and definition of bailable and non-bailable offenses.
Eleanor de Montfort is captured by pirates in the employ of Edward I of England to prevent her marriage to Llywelyn the Last, prince of Wales; she is used as a bargaining chip over the coming years in Edward's attempts to subjugate Llywelyn and Wales.
Scottish forces defeat the Manx of the Isle of Man in a decisive battle, firmly establishing Scottish rule of the island.
Jean de Meun completes the Frenchallegorical work of fiction, Roman de la Rose, with a second section; the first section was written by Guillaume de Lorris in 1230.
The verge escapement, a simple type of escapement used in clocks, is invented (exact year unknown).
The first main survey of the Hundred Rolls, an Englishcensus seen as a follow up to the Domesday Book completed in 1086, is finished; it began in 1274.
March - the 200,000 multiethnic troops of the Mongol-led Yuan Dynasty, headed by the Turkish commander Bayan, face a ChineseSong Dynasty army of 130,000 led by the Song Chancellor Jia Sidao. The result is a decisive victory for the Yuan Dynasty, and soon after the much-vilified Jia Sidao is stripped of rank and title, and killed by one of his own guards as he is sent to exile in Fujian by the Song court.
Invading Mongol forces capture the Chinese city of Suzhou.
