If Alexander's soldiers hadn't grown tired of war and wanted to go back to their families, Alexander would probably have been able to conquer even more.
Ancient Macedonia was not Ancient Greece - it was Hellenistic, or an imitation of Greek culture. Alexander the Great led the Macedonian empire and was able to claim the largest empire in history, spanning from Greece all the way to India. If Alexander's soldiers hadn't grown tired of war and wanted to go back to their families, Alexander would probably have been able to conquer even more.