Timeline of Somerset history

Key dates in the history of Somerset
 * 43–47 – Roman invasion and occupation
 * 491 – Battle of Mons Badonicus (may have been fought in Somerset) (uncertain date)
 * 537 – Battle of Camlann (sometimes located at Queen Camel) (uncertain date)
 * 577 – Battle of Deorham (Dyrham, Gloucestershire) – Saxons occupied Bath
 * 658 – Battle of Peonnum (Penselwood ?) – Saxons then occupied most of Somerset
 * 710 – Battle of Llongborth (? Langport)
 * 845 – First documentary reference to "Somersæte"
 * 878 – Battle of Cynwit – Saxon victory over the Danes by Ealdorman Odda
 * 878 – Battle of Ethandun – West Saxon victory over the Danes (uncertain whether in Somerset or Wiltshire)
 * 878 – Treaty of Wedmore – after defeat of Danes by King Alfred the Great
 * c900 – Kings of Wessex hold court at Cheddar
 * 973 – King Edgar of England crowned at Bath
 * 988 – St Dunstan buried at Glastonbury
 * 1013 – Danish king Sweyn Forkbeard received submission of western thegns at Bath
 * 1088 – Siege of Ilchester
 * 1191 – Discovery of "King Arthur's" tomb at Glastonbury
 * 1497 – Perkin Warbeck's rebellion supported by Somerset men
 * 1643 – Battle of Lansdowne
 * 1645 – Siege of Taunton during the English Civil War
 * 1685 – Battle of Sedgemoor – Duke of Monmouth defeated
 * 1685 – Judge Jeffries holds the "Bloody Assizes" at Taunton
 * 1770 – Start of major enclosures of Somerset Levels
 * 1805 – Somerset Coal Canal Opened
 * 1827 – Bridgwater and Taunton Canal opened
 * 1875 – Formation of Somerset County Cricket Club
 * 1898 – County boundaries altered
 * 1956 – Chew Valley Lake opened by Queen Elizabeth II
 * 1974 – Formation of County of Avon, reducing the area of the County of Somerset
 * 1996 – Abolition of the County of Avon, creating the unitary authorities of North Somerset and Bath and North East Somerset