The Ottoman-Saffavie war and interior problems caused new problem especially in Poland and Crimea. Political conflicts occurred in Crimea, in order to hinder these conflicts Sultan Murad IV ascended Can Giray to throne and restored Ottoman authority there. Poland had accepted the Ottoman supremacy and to pay annual taxes in 1630. But, they began not to pay taxes and Sultan Murad decided to declare a war against Poland. Polish King Vladislas asked for peace and the treaties between two countries were renovated.