CEVAP:

The sons of Czar Ivan IV died which brought the Rurik dynasty to an end. It also caused other troubles like a civil war, famine and epidemics. During the Polish–Russian War (1605–18), Russia was occupied by the Polish Lithuanian Commonwealth. In 1610, the king of Poland wanted to claim the throne of the Czar, and this set off the nationwide movement of liberation. Prince Dmitry Pozharsky and merchant Kuzma Minin organized a volunteer army and drove out foreign invaders from Moscow, and finished the Time of Troubles in 1612.