Смутное время
"Time of Troubles and Reconstruction:" During the Time of Troubles (1598–1613) Moscow lost control of much of the southern area. Various towns were sacked by the Poles, Tatars, and Zaporozhian Cossacks. The Truce of Deulino ended the Russo-Polish War (1605–1618) and Russia lost Smolensk, Seversk, and Chernihiv. During the period of reconstruction (1618–33) the south continued to be neglected. The only significant new fort was Lebedyan.