The first streltsy units were created by Ivan the Terrible sometime between 1545 and 1550 and armed with arquebuses. During his reign, Russia was fighting wars almost continuously, including the Livonian War in the North and wars against the Khanates in the South. They first saw combat at the Siege of Kazan in 1552. Initially, the streltsy were recruited from among the free tradespeople and from the rural population. Subsequently, military service in this unit became lifelong and hereditary. Thus, while earlier in the 16th century they had been an elite force, their effectiveness was reduced by poor training and lack of choice in recruiting.