Poland was now sorely pressed. Charles X of Sweden invaded the (p. 143) kingdom and took two of its capitals. The Cossack and Lithuanians entered it from the south, and the Czar Alexis at the head of his own army attacked it on the east. He maintained strict discipline so that the Polish Governors said, "Moscow makes war in quite a new way, and conquers the people by the clemency and good-nature of the czar." The towns of White Russia opened their gates to his army, and Smolensk surrendered after a five weeks' siege. The Swedes captured Warsaw, the last capital of the misruled kingdom.
It was the jealousy of its enemies that saved Poland this time. Alexis entered into a truce and attacked Sweden. This war was carried on from 1656 until 1661, and ended by the peace of Cardis whereby neither country gained any advantage. The Poles, seeing the danger they had incurred, rallied, and once again war broke out with Russia. It was carried on with various success until both countries were exhausted. In 1661, a thirteen years' truce was concluded, whereby Russia restored Lithuania, but kept Little Russia on the left bank of the Dnieper, together with Kief and Smolensk.
In 1668, a revolt was organized by the Metropolitan of Kief, who preferred the jurisdiction of the Patriarch of Constantinople to that of Moscow. As a result, Little Russia was subject to all the horrors of war, but the Russian power prevailed in the end. Then the Cossacks of the Don broke out, and until 1671 the territory between that river and the Volga suffered terribly.
Alexis' reign was remarkable for the introduction of so-called "reforms" in the Church, which were confined wholly to ceremonies (p. 144) and externals. The czar supported the "reformer" Nicon, and those who did not agree with him were called _religious madmen_ and suffered persecution. The monasteries near Archangel rebelled and troops were sent against them; but it was eight months before the sturdy monks capitulated.
Alexis continued his father's efforts to reëstablish intercourse with Western Europe. But the West was only recovering from the terrible Thirty Years' War, so that little interest was shown.
Alexis had married twice. From the first marriage he had two sons Feodor and Ivan, and six daughters; by his second wife he had one son, Peter, and two daughters. When he died, in 1676, he was succeeded by his eldest son Feodor.