 Complete the following phrase:  However, the Tsardom was weakened by the long and unsuccessful Livonian War against the coalition of Poland, Lithuania, Sweden, Denmark, and Norway for access to the Baltic coast and sea trade. At the same time, the Tatars of the Crimean Khanate, the only remaining successor to the Golden Horde, continued to raid southern Russia. In an effort to restore the Volga khanates, Crimeans and their Ottoman allies invaded central Russia and were even able to burn down parts of Moscow in 1571. But in the next year the large invading army was thoroughly defeated by the Russians in the 