It was owing to a series of dynastic revolutions and usurpations that young Michael Romanoff, Peter's grandfather, was chosen Tsar at the age of fifteen, in 1613. He was succeeded in 1645 by his son, Alexis Michaelovitch. Alexis, in his wars with Poland, recovered from her Smolensk, Kiev, and the Ukraine. He waged war with the Turk in aid of Poland, introduced manufactures, and codified the laws, proving himself a worthy sire for Peter the Great; but he died in 1677 too soon--he was but forty-six--to complete the work he had begun. He was succeeded by his eldest son, Feodor. There was a second, Ivan; and Peter, not five years old, the child of his second marriage. Dying five years later, Feodor named Peter his successor. An elder sister, Sophia, intrigued to place the incapable Ivan on the throne instead, as her own puppet, by the aid of the turbulent Strelitz Guard. After a series of murders, the Strelitz proclaimed Ivan and Peter joint sovereigns, associating Sophia with them as co-regent. Sophia ruled with the aid of an able minister, Gallitzin. But she formed a conspiracy against Peter, who, however, made his escape, rallied his supporters, crushed the conspiracy, and secured his position as Autocrat of the Russias, being then in his seventeenth year (1689). Peter not only set himself to repair his neglected education by the study of German and Dutch, and an instinctive horror of water by resolutely plunging himself into it; he developed an immediate interest in boats and shipping, and promptly set about organising a disciplined force, destined for use against the Strelitz. The nucleus was his personal regiment, called the Preobazinsky. He had already a corps of foreigners, under the command of a Scot named Gordon. Another foreigner, Le Fort, on whom he relied, raised and disciplined another corps, and was made admiral of the infant fleet which he began to construct on the Don for use against the Crim Tartars. His first political measure was to effect a treaty with China, his next an expedition for the subjugation of the Tartars of Azov. Gordon and Le Fort, with their two corps and other forces, marched on Azov in 1695. Peter accompanied, but did not command, the army. Unsuccessful at first, his purpose was effected in 1696; Azov was conquered, and a fleet placed on its sea. He celebrated a triumph in Roman fashion at Moscow; and then, not content with despatching a number of young men to Italy and elsewhere to collect knowledge, he started on his travels himself.