1421: Bliain
| Blianta: 1418 1419 1420 - 1421 (MCDXXI) - 1422 1423 1424 | |
| Deicheanna blianta: 1390í 1400í 1410í - 1420í - 1430í 1440í 1450í | |
| Céadta blianta: 14ú céad - 15ú céad - 16ú céad | |
Eachtraí
- Bhuaigh na Francaigh ar na Sasanaigh i gCath Baugé sa Normainn.
- Tháinig Murad V i gcoróin.
Breitheanna
- Anraí VI Shasana
- Ponhea Yat
Básanna
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