Catherine I of Russia to bribe the Ottoman grand vizier Baltacı Mehmet Pasha into allowing a retreat. Mehmet allowed the retreat, whether motivated by the bribe or considerations of trade and diplomacy. In any case Peter credited Catherine and proceeded to marry her again (this time officially) at Saint Isaac's Cathedral in St. Petersburg on 9 February 1712. Catherine was Peter's second wife; he had previously married and divorced Eudoxia Lopukhina, who had borne him the Tsarevich Alexis Petrovich. Upon their wedding, Catherine took the style of her husband and became Tsarina. When Peter elevated the Russian Tsardom to Empire, Catherine became Empress. The
Swedish invasion of Russia the Battle of Poltava, and shortly thereafter lost more possessions. George I of Great Britain led Great Britain and Prussia into war against Sweden, and Denmark reentered the war. Russia maintained its conquered possessions in Ingria and the Baltic, was able to consolidate its hold over Ukraine and Poland, develop the new city of Saint Petersburg, and gain vital trade links in the Baltic trade. Peter the Great also gained further prestige in Europe, and won Louis XIV as an ally. Swedish invasion of Russia The invasion of Russia by Charles XII of Sweden was a campaign undertaken during the