1230

- March 9 - Bulgarian tsar Ivan Asen II defeats Theodore of Epirus near the village of Klokotnitsa.
- Kingdom of Leon unites with the Kingdom of Castile.
- Approximate year of creation for the Carmina Burana poetry and song collection.
- In the West African village of Siby, Sundiata Keita, founder of the Mali Empire, forced the Malinkés to bind themselves to each other by oath.