Аварский каганат
Timočani settled in the Balkans in the 6th century and became later subjects of the Avar Khaganate. In 805 that area was conquered of the Bulgar Khanate under Khan Krum. In 818 during the rule of Omurtag of Bulgaria (814-836) they, together with other border tribes of the First Bulgarian Empire, revolted because of an administrative reform that deprived them of much of their local authority.