in the campaign “Founding and Fortification of the Terek Town (1588–1623)”
The military forces of the Tsardom of Muscovy built a new fortified base: historian E. N. Kusheva writes that they «were building it in 1588-1589... Mikhailo Burtsev and Kelar Protasyev... the main force of its garrison consisted of streltsy armed with «fire weaponry», with pishchal arquebuses»[1], while historians A. S. Kulikov and V. A. Runov add that in the early 17th century «the Terek fort had turned into a rather powerful fortress. Its artillery numbered 40 large guns»[2].