In the wake of taking Constantinople, the Ottoman Empire would spend the next few centuries expanding its size, power, and influence, bumping up against Eastern Europe and becoming one of the world's most important geopolitical players. It was a rise that would not truly start to wane until the 19th century, and in the centuries before the decline of the "sick man of Europe," the Ottomans frequently tried to push further into Europe.

Some of those forays were memorably countered by Western Europeans and the Holy League, but the Ottomans' most frequent foe was the Russian Empire, which opposed them for both geopolitical and religious reasons. From negotiations to battles, the two sides jockeyed for position over the course of hundreds of years, and the start of the fighting may have represented the Ottomans' best chance to conquer Moscow and change the course of history.

For anyone trying to understand the origins of modern Russia and the start of the Russo-Turkish Wars, the search should begin with Tsar Peter I (1672-1725), who titled himself Peter the Great during his lifetime. The moniker is fitting, considering the manner in which Peter brought Russia out of the Middle Ages and into the 18th century. Through a series of campaigns, Peter turned Russia into a formidable empire that would subsequently become a major force on the European continent, while also emulating Western Europe and turning Russia into an international state that interacted with the other continental powers. By revolutionizing and modernizing Russian arms, including the creation of Russia's first naval force, Peter was able to pursue an aggressive and expansionist foreign policy that set the stage for the way the European map would be redrawn again and again over the coming centuries.