| Ruler | Country | Start of Reign | Age at 1420 |
| Henry V | England | 1413 | ? |
| 1420 May 21 | Treaty of Troyes  | | 1420 Jun 2 | Henry marries  | | 1421 Feb 23 | Queen Catherine crowned  | | 1421 Dec 6 | Birth of Henry (VI)  | | 1422 May | Meaux falls to the English  | | 1422 Aug 31 | Henry V dies  |
|
| Henry IV | England | 1422 | ? |
| 1421 Dec 6 | Birth of Henry (VI)  | | 1422 Sep 1 | Henry VI becomes king  | | 1422 Oct 21 | Charles VI of France dies  | | 1429 Nov | Henry VI crowned  |
|
| James I | Scotland | 1406 | ? |
| Charles VI | France | 1380 | ? |
| 1420 May 21 | Treaty of Troyes  | | 1420 Jun 2 | Henry marries  | | 1422 Oct 21 | Charles VI of France dies  |
|
| Charles VII | France | 1422 | ? |
| 1429 Feb | Joan visits Charles VII  | | 1429 Jul 17 | Charles VII crowned at Rheims  |
|