States and territories established in the 1430s

Jagoldai (Tatar: Җагалдай, Cağolday, Cağalday; ; , ''Yagoldayeva t'ma''; pronunciation: or ) was a small Tatar tumen (territorial and military-administrative unit) in what is now Kursk Oblast and Belgorod Oblast of Russia, as well as parts of Sloboda Ukraine. It existed as a vassal state of the Grand Duchy of Lithuania during the 15th and early 16th centuries.