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| 1351 | Birth |  |
| Birth of Edmund de Mortimer |
| 1360 | Peerage | |
| London Created Earl of March, 3rd |
| 1368 | Marriage | |
| London Marries Philippa, daughter of Edward III's son Lionel & inherits the earldom of Ulster |
| 1368 | Peerage | |
| London Created Earl of Ulster, 1368-81 |
| 1368 | Succession | |
| London Next in line to the throne after death of father's wife, the Black Prince & his son |
| 1369 | Marshal | |
| London Appointed Marshal of England, 1369-1377 |
| 1374 | Birth | |
| Birth of Roger de Mortimer, son of the 3rd Earl of March |
| 1377 | Coronation | |
| Westminster Abbey Bears the sword & spurs at Richard II's coronation |
| 1379 | Lieutenant Ireland | |
| Appointed Lieutenant of Ireland |
| 1381 | Death | |
| Kells Death of Edmund Mortimer, gives the House of York the claim to the English throne |
| 1381 | Succession | |
| Kells Death of Edmund Mortimer, gives the House of York the claim to the English throne |
| 1385 | Succession | |
| Proclaimed heir presumptive to the English throne |
| 1388 | Marriage | |
| Marries the niece of King Richard II |
| 1397 | Battle of Kells | |
| Kells Death of Edmund Mortimer, killed in the battle of Kells |
| 1397 | Death | |
| Kells Death of Edmund Mortimer, killed in the battle of Kells |
| 1397 | Lieutenant Ireland | |
| Appointed Lieutenant of Ireland |
| 1402 | Battle of Pilleth | |
| 22nd June Pilleth Defeated by Owen Glendower |
| 1402 | Rebellion | |
| Henry IV sends Edmund de Mortimer to Wales to crush the Welsh rebellion |
