The Rus' chronicles, or Russian chronicles, was the primary Rus' historical literature. Chronicles were composed from the 11th to the 18th centuries.
Chronicles were the main historical narrative until the mid-16th century (the reign of Ivan the Terrible), when they were superseded by chronographs.
The Cumans or Kumans were a Turkic nomadic people from Central Asia comprising the western branch of the Cuman–Kipchak confederation who spoke the Cuman language. They are referred to as Polovtsians (Polovtsy) in Rus' chronicles, as "Cumans" in Western sources, and as "Kipchaks" in Eastern sources.
Related to the Pechenegs, they inhabited a shifting area north of the Black Sea and along the Volga River known as Cumania, from which the Cuman–Kipchaks meddled in the politics of the Caucasus and the Khwarazmian Empire. The Cumans were fierce and formidable nomadic warriors of the Eurasian Steppe who exerted an enduring influence on the medieval Balkans. They were numerous, culturally sophisticated, and militarily powerful.