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| Alliance Clare, Gilbert de |  |
| June London Falls out with de Montfort after the latter's Alliance with the Welsh |
| Alliance Despenser, Hugh | |
| Joins the de Montfort party |
| Alliance Montfort | |
| River Severn Cross es the River Severn & joins forces with Llewelyn |
| Arrest of Edward I Edward I | |
| Lewes Taken hostage but escapes & with Welsh help kills Simon de Montfort |
| 14th May Lewes Captured with his father at the battle of Lewes |
| Arrest of Montfort Edward I | |
| Northampton Arrests the younger Simon de Montfort |
| Arrest of Richard of Cornwall Richard of Cornwall | |
| 14th May Lewes Taken prisoner at the Battle of Lewes |
| Battle of Lewes Bohun, Humphrey de | |
| 14th May Lewes Fights for the barons at the battle of Lewes |
| Battle of Lewes Borham, Henry de | |
| 14th May Lewes Fights for the barons at the battle of Lewes |
| Battle of Lewes Burgh, John de | |
| 14th May Lewes Fights for the barons at the battle of Lewes |
| Battle of Lewes Clare | |
| 14th May Lewes Contributes to Simon de Montfort's victory |
| Battle of Lewes Clare, Gilbert de | |
| 14th May Lewes Contributes to Simon de Montfort's victory |
| 14th May Lewes Fights for the barons at the battle of Lewes |
| 14th May Lewes Helps Simon de Montfort to victory at the battle of Lewes |
| Battle of Lewes Edward I | |
| 14th May Lewes Captured with his father at the battle of Lewes |
| Battle of Lewes Fitzjohn | |
| 14th May Lewes Fights for the barons at the battle of Lewes |
| Battle of Lewes Giffard, John | |
| 14th May Lewes Fights for the barons at the battle of Lewes |
| Battle of Lewes Hastings, Henry de | |
| 14th May Lewes Fights for the barons at the battle of Lewes |
| Battle of Lewes Henry III | |
| 14th May Lewes Captured & imprisoned by Simon de Montfort who dictates peace terms |
| Battle of Lewes Montchensey | |
| 14th May Lewes Fights for the barons at the battle of Lewes |
| Battle of Lewes Montfort, Guy de | |
| 14th May Lewes Fights for the Barons at the Battle of Lewes |
| Battle of Lewes Montfort, Henry de | |
| 14th May Lewes Fights for the Barons at the Battle of Lewes |
| Battle of Lewes Montfort, Simon de | |
| 13th May Fletching Arrives at Fletching from London 9 miles north of Lewes |
| 13th May Fletching The Royalists in Lewes refuse to listen to mediation |
| 14th May Lewes Captures & imprisons Henry III & Richard of Cornwall, then dictates peace terms |
| 14th May Lewes Gathers his troops & marches to the summit of the South Downs overlooking Lewes |
| 14th May Lewes Shares command with his father Simon de Montfort |
| Battle of Lewes Richard of Cornwall | |
| 14th May Lewes Taken prisoner at the Battle of Lewes |
| Battle of Lewes Segrave, Nicholas de | |
| 14th May Lewes Fights for the Barons at the Battle of Lewes |
| Battle of Lewes Warenne, John de | |
| 14th May Lewes Fights in support of Henry III |
| Birth of Fauconberg, Walter de Fauconberg, Walter de | |
| Birth of Walter de Fauconberg |
| Capture of Leicester Henry III | |
| April Leicester Leicester surrenders to Henry III |
| Capture of Northampton Henry III | |
| April Northampton Nottingham surrenders to Henry III |
| 5th April Northampton Prince Edward captures Northampton from the rebellious barons |
| Capture of Rochester Clare, Gilbert de | |
| April Rochester Helps Simon de Montfort capture Roches ter |
| Capture of Rochester Henry III | |
| April Rochester Simon de Montfort captures Roches ter |
| Constitution Henry III | |
| De Montfort calls up a pre-Parliament |
| 15th May Forced to accept de Montfort's conditions & the ruleof the Barons |
| Exile of Warenne Warenne, John de | |
| Forced into exile to France after defeat at the battle of Lewes |
| Mise Amiens Despenser, Hugh | |
| 25th Jan Amiens Londoners refuse to obey the Mise of Amiens |
| Mise Amiens Henry III | |
| 25th Jan Amiens A judgement of Louis IX in favor of Henry III against the English barons |
| 25th Jan Amiens Louis IX rules in Henry's favour |
| 25th Jan Amiens The Oxford Provisions are declared void by the Mise of Amiens |
| 25th Jan Amiens The Provisions of Oxford are declared invalid |
| Mise Amiens Montfort, Simon de | |
| 25th Jan Amiens Louis IX finds in favor of Henry III & exempts him from the Provisions of Oxford |
| 25th Jan Amiens The Mise of Amiens provokes de Montfort into leading another Baron's War |
| 15th May Amiens Establishes Government by council divesting Henry III of real power |
| 15th May Amiens Montfort becomes de facto ruler of England |
| Parliament Opening Clare, Gilbert de | |
| June London Montfort and Gilbert organize a new parliament |
| Peace Henry III | |
| 12th Aug Canterbury Government reform is confirmed |
| Peace Montfort, Simon de | |
| 12th Aug Canterbury Government reform is confirmed |
| Provisions Oxford Henry III | |
| 25th Jan Amiens The Oxford Provisions are declared void by the Mise of Amiens |
| Rebellion Bigod, Roger | |
| Joins de Montfort in the Baron's War |
| Rebellion Despenser, Hugh | |
| 25th Jan London Londoners join Despenser who hold the Tower & burn the manor of the King of the Romans |
| Rebellion Henry III | |
| 23rd Jan Amiens Mise of Amiens , judgment of Louis ix in favor of Henry III & against the Barons |
| Feb London Joined by Prince Edward, the war against the Barons begins |
| Rebellion Montfort, Simon de | |
| London Organises resistance in the south |
| London Sends his elder sons Simon & Henry to head the revolt in the midlands & west |
| Siege of Gloucester Edward I | |
| Gloucester Attempts the trap Henry Montfort but is forced to call a truce & returns to Oxford |
| Siege of Northampton Henry III | |
| 4th April Northampton The Royal Army attacks Simon Montfort but is held back on the first day |
| 5th May Northampton The Royal Army captures Simon Montfort & captures his head quarters at Northampton |
| Siege of Nottingham Henry III | |
| April Nottingham The Royal Army captures Nottingham |
| Siege of Rochester Henry III | |
| Rochester Sends forces from Nottingham to succesfully relieve Roches ter from Simon de Montfort |
| Siege of Rochester Montfort, Simon de | |
| Rochester Captures Roches ter to open up a route to the Cinque Ports |
| Rochester Fails to capture Roches ter castle & withdraws to London |
| Siege of Rochester Warenne, John de | |
| Rochester Blocks Simon de Montfort's route from London to the Cinque Ports |
| Rochester Provokes Simon de Montfort's failed attempt to capture Roches ter Castle |
| Siege of Tower of London Despenser, Hugh | |
| 25th Jan Tower of London Londoners join Despenser who hold the Tower & burn the manor of the King of the Romans |
| Siege of Warwick Giffard, John | |
| Warwick John Giffard besieges Warwick castle on behalf of de Montfort against Henry III |
| Siege of Warwick Mauduit | |
| Warwick John Giffard besieges Warwick castle on behalf of de Montfort against Henry III |
