Which modern-day countries mark the eastern and western borders of alexander's empire? turkey, china turkey, russia greece, india greece, afghanistan

Greece, India

Explanation:

Alexander III of Macedon, more often referred to as Alexander the Great, was one of the greatest military tacticians in the human history. The young Macedonian king managed to conquer vast territory on the foundations that his father, Phillip II of Macedon, set for him. When Alexander came to power, the territory he had at disposal was Macedonia, Paionia (which allied with Macedonia after the invasion), parts of Thrace and Illiria, and the Greek city-states (which were a big danger considering the traditional hate and tensions between these two groups of people). Alexander first secured the Greek city-states to avoid problems with them, and than started to conquer territories in the east, managing to reach India. The empire was stretching from what is now Albania (not Greece, as the Greek territory is just slightly more east than the westernmost point of the empire) to what is now India.