Kazan is the largest city and capital of Tatarstan, Russia. The city lies at the confluence of the Volga and the Kazanka Rivers, covering an area of 425.3 square kilometres, with a population of over 1.3 million residents, and up to nearly 2 million residents in the greater metropolitan area. Kazan is the fifth-largest city in Russia, being the most populous city on the Volga, as well as within the Volga Federal District.

The siege of Kazan in 1552 was the final battle of the Russo-Kazan Wars and led to the fall of the Khanate of Kazan. Conflict continued after the fall of Kazan, however, as rebel governments formed in Çalım and Mişätamaq, and a new khan was invited from the Nogais. This guerrilla war lingered until 1556.