February 9 – The Adana campaign begins when the Mamluk Sultanate, based in the Middle East, begins a siege to recover the city of Adana (now in Turkey), recently captured by the Ottoman Empire. General Uzbek min Tutuh, Governor of Damascus, leads the Mamluk troops
March 16 – A solar eclipse crosses northern South America and Central Europe. (March 8 O.S.)[6] Although King Richard III’s wife, the Queen Consort, dies on March 16, 1485 as well, the Julian calendar date is eight days sooner than the Gregorian calendar date of March 24.
April–June
April 16 – Vuk Grgurevic Brancovic, the Despot of Serbia under Hungarian rule, dies after a reign of 14 years, bringing the Brankovic dynasty to an end, leaving the office vacant and prompting Hungary’s King Matthias Corvinus to find a suitable heir.
May 26 – King James III of Scotland gives royal assent to numerous acts passed by the Scottish Parliament, including the England Act (regarding the peace between “betuix our soverane lord and Richard king of Ingland”, and “the marriage and alliance appointed to be made and performed.”)[8]
June 22 – King Richard III of England, alerted to news that Henry Tudor, Earl of Richmond, is planning to invade England, orders his lords to be fully alert.[9]
July–September
August 1– Accompanied by his own troops and French mercenaries, Henry Tudor sets sail from Honfleur in France with 30 ships to begin his second attempt to invade the Kingdom of England.[10]
August 7– After departing France and sailing around the south coast of the island of Britain, Henry Tudor and his troops enter Mill Bay and land near Dale, PembrokeshireWales without opposition,[11] and begin marching toward London to attack King Richard, camping at Haverfordwest. From there, the Tudor supporters march north to Cardigan; Llwyn Dafydd; Llanilar, Aberystwyth; Machynlleth, then turn eastward at Mathafarn on August 14.
August 11– News of Henry’s landing at Wales reaches Richard, who issues a mobilization order that his lords received on August 14.
August 15– Henry Tudor’s army begins crossing the border from Wales into England at Mathafarn, then marches towards London.
September 8 – The army of the Grand Duchy of Moscow forces, led by Ivan III, invades the city of Tver, ruled by Mikhail III and capital of the Duchy of Tver. Within 10 days, Ivan is able to claim the Duchy.
Peter Arbues is assaulted while praying in the cathedral at Zaragoza in the Kingdom of Aragon, now part of Spain; he dies on September 17. He had been appointed Inquisitor of Aragon by the Inquisitor General, Tomás de Torquemada, in the campaign against heresy and Spanish Judaism.
Less than four weeks after the Battle of Bosworth and the defeat of Richard III, King Henry VII summons the English Parliament, directing the members of the House of Lords and the House of Commons to assemble at Westminster for the November 7 opening of the English Parliament.
^Ralph Griffith (1993). Sir Rhys ap Thomas and his family: a study in the Wars of the Roses and early Tudor politics, University of Wales Press, p. 43, ISBN 0708312187.
^Thomas Penn (2011). Winter King: Henry VII and The Dawn of Tudor England, Simon & Schuster, p. 9, ISBN 978-1-4391-9156-9