https://en.wikipedia.org/wiki/Rus'_Khaganate
The Rus' Khaganate, also Russkiy Khaganate (Belarusian: Рускі каганат, Ruski kahanat, Russian: Русский каганат, Russkiy kaganat, Ukrainian: Руський каганат, Ruśkyj kahanat), is the name applied by some modern historians to a polity postulated to have existed during a poorly documented period in the history of Eastern Europe, roughly the late-8th-century ...