The Caucasian War or the Caucasus War was a 19th-century military conflict between the Russian Empire and various peoples of the North Caucasus who resisted subjugation during the Russian conquest of the Caucasus. It consisted of a series of military actions waged by the Russian Imperial Army and Cossack settlers against the native inhabitants such as the Adyghe, Abazins, Ubykhs, Chechens, Dagestanis as well as the majority of Abkhazians despite the official principality of Abkhazia being on Russian Empire's side as the Tsars sought to expand.