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| 1146 | Birth |  |
| Birth of William Marshal, 1st Earl of Pembroke |
| 1167 | Knighthood | |
| Marshall is knighted |
| 1168 | Ransom | |
| Marshall is ransomed ransomed by Eleanor of Aquitaine |
| William's uncle is killed in an ambush by Guy of Lusignan, William is injured and captured in the same battle, but is ransomed by Eleanor of Aquitaine |
| 1170 | Tutor | |
| Appointed tutor in chivalry for Henry the Young King & stands by the young king during the Revolt of 1173-1174 |
| 1182 | Exile | |
| William Marshal is accused of undue familiarity with Marguerite of France, the Young King's wife, and is exiled from court |
| 1182 | Scandal | |
| Accused of undue familiarity with Marguerite of France, the Young King's wife, and exiled from court |
| 1183 | Crusades | |
| Crusades in the Holy Land from 1183 to 1186; while there he vows to be buried as a Knight Templar |
| 1186 | Crusades | |
| Upon his return from the Crusades William rejoins the court of King Henry II, and serves the father through the many rebellions of his remaining sons (Richard, Geoffrey, and John) |
| 1186 | Exile | |
| Rejoins the court of Henry II |
| 1189 | Marriage | |
| For his service to them, the Plantagenets give Marshal as his bride the 2nd richest heiress in England, Isabel de Clare and is was granted the title of Pembroke |
| Isabel de Clare father, Strongbow, had been Earl of Pembroke, and this title was granted to Pembroke |
| 1189 | Rebellion | |
| While covering the flight of Henry II from Le Mans to Chinon, William unhorses the undutiful Richard in a skirmish, William could have killed the Prince but kills his horse instead, to make a point |
| 1190 | Birth | |
| Normandy Birth of William Marshall, 1st Earl of Pembroke, son of William Marshal, 1st Earl of Pembroke |
| 1203 | Hostages | |
| 6th April From 1203 to 1212, is a hostage at the court of King John as a guarantee of his father's behaviour |
| 1205 | Diplomacy | |
| Normandy Sent on a failed mission to do homage to Phiip II for John's lands in Normandy |
| 1214 | Marriage | |
| Marshal marries Alice de Bethune, daughter of his father's friend Baldwin de Bethune |
| 1215 | Magna Carter | |
| 15th June Runnymede Marshall deals with the barons who make King John agree to the Magna Carta |
| 15th June Runnymede William is one of the few English noblemen to remain loyal to the royal side through the Barons' War |
| 1215 | Rebellion | |
| During the baronial rebellion of 1215, William is on the side of the rebels while his father fights for the king |
| 1216 | Battle of Lincoln | |
| Lincoln Rejoins his father at the battle of Lincoln |
| 1216 | Constitution | |
| London The Magana Carter is reissued after Henry III's coronation |
| 1216 | Excommunication of Marshall | |
| Absolved from excommunication & rejoins the royalist cause |
| 1216 | Magna Carter | |
| London The Magana Carter is reissued after Henry III's coronation |
| 1216 | Rebellion | |
| Absolved from excommunication & rejoins the royalist cause |
| When Louis of France took Worcester castle the younger William is warned by his father to withdraw, which he did just before Ranulf, Earl of Chester retook the castle |
| 1216 | Regency | |
| 29th Oct London Appointed Regent for the 9 year old Henry III |
| 11th Nov Named by the king's council (barons who had remained loyal to King John in the First Barons' War) to serve as both regent of Henry III & regent of the kingdom |
| 1216 | Siege of Worcester | |
| Worcester When Louis of France took Worcester castle the younger William is warned by his father to withdraw, which he did just before Ranulf, Earl of Chester retook the castle |
| 1217 | Battle of Lincoln | |
| 24th Aug Lincoln Absolved from excommunication and rejoins the royal cause and at the battle of Lincoln fights with his father |
| 24th Aug Lincoln Leads King Henry III's army to victory against Prince Louis |
| 24th Aug Lincoln Victory makes Henry III the undisputed King of England |
| 1217 | Constitution | |
| London The 1216 version of the Magna Carter is reissued |
| 1217 | Magna Carta | |
| Sep After the peace of 1217 William reissues Magna Carta, in which he is a signatory as one of the witnessing barons |
| Sep Without William's presence England may not have survived the disastrous reign of John; where the French and the rebels would not trust the English king's word, they would trust William |
| 1217 | Siege of London | |
| Sep London Preparing to besiege Louis in London when the war is terminated by the naval victory of Hubert de Burgh in the straits of Dover |
| 1217 | Treaty of Lambeth | |
| 12th Sep Lambeth Helps secure the throne for Henry III after the battle of Lincoln |
| 1219 | Burial | |
| London Buried in the Temple Church in London, where his effigy may still be seen |
| 1219 | Death | |
| 14th May Death of William Marshal, 1st Earl of Pembroke |
| 14th May Caversham Death of William Marshal, fulfilling the vow he had made while on crusade, he is invested into the order of the Knights Templar on his deathbed |
| 1219 | Knights Templar | |
| 14th May Caversham Death of William Marshal, fulfilling the vow he had made while on crusade, he is invested into the order of the Knights Templar on his deathbed |
| 1219 | Lord Marshal | |
| After his father's death succeeds the elder William as both Earl of Pembroke and as Lord Marshal of England, the two titles, combined with his father's legendary status, make William one of the most powerful men in England |
| 1219 | Peerage | |
| After his father's death succeeds the elder William as both Earl of Pembroke and as Lord Marshal of England, the two titles, combined with his father's legendary status, make William one of the most powerful men in England |
| 1223 | Rebellion | |
| Crosses fro Ireland to campaign against Llywelyn ap Iorwerth, who had attacked his honour of Pembroke, he is successful, but seen as too independent by the regency |
| 1224 | Marriage | |
| 23rd April Eleanor of England, youngest daughter of King John of England and Isabella of Angouleme, thereby strengthening the family's connection with the Plantagenets |
| 1226 | Cardigan Castle | |
| Cardigan Castle Ordered to surrender the custody of the royal castles of Cardigan & Carmarthen, that he had captured from Llywelyn, to the crown |
| 1226 | Carmarthen Castle | |
| Carmarthen Castle Ordered to surrender the custody of the royal castles of Cardigan & Carmarthen, that he had captured from Llywelyn, to the crown |
| 1226 | Justiciar | |
| Cardigan Hugh de Lacy attacks William's and the King's lands in Ireland, William is appointed Justiciar of Ireland, and manages to subdue Hugh |
| 1226 | Rebellion | |
| Hugh de Lacy attacks William's and the King's lands in Ireland, William is appointed Justiciar of Ireland, and manages to subdue Hugh |
| William's actions are seen as too independent by Henry III's regents, he was ordered to surrender the custody of the royal castles of Cardigan and Carmarthen, that he had captured from Llywelyn, to the crown |
| 1226 | Rule of Ireland | |
| Hugh de Lacy attacks William's and the King's lands in Ireland, William is appointed Justiciar of Ireland, and manages to subdue Hugh |
| 1226 | Rule of Wales | |
| Ordered to surrender the custody of the royal castles of Cardigan and Carmarthen, that he had captured from Llywelyn, to the crown |
| William's actions are seen as too independent by Henry III's regents, he was ordered to surrender the custody of the royal castles of Cardigan and Carmarthen, that he had captured from Llywelyn, to the crown |
| 1226 | Siege of Cardigan | |
| Cardigan Ordered to surrender the custody of the royal castles of Cardigan and Carmarthen, that he had captured from Llywelyn, to the crown |
| 1226 | Siege of Carmarthen | |
| Carmarthen Ordered to surrender the custody of the royal castles of Cardigan and Carmarthen, that he had captured from Llywelyn, to the crown |
| 1230 | Invasion of Brittany | |
| Brittany William accompanies the King to Brittany, and assumes control of the forces when the king returned to England. |
| 1230 | Rule of Brittany | |
| Brittany William accompanies the King to Brittany, and assumes control of the forces when the king returned to England. |
| 1231 | Burial | |
| April London Buried at New Temple Church, London |
| 1231 | Death | |
| 6th April Death of William Marshall, 1st Earl of Pembroke |
| 1231 | Marriage | |
| Arranges the marriage of his sister Isabel, widow of Gilbert de Clare, to Richard, Earl of Cornwall, brother to King Henry III |
