From Libya to Central Asia.
Alexander the Greats goals were to expand his empire as far as he could and to conquer all enemies he came across. He was very successful, he conquered his major enemy, the Persian empire, and any other enemy in his path. He also expanded his empire all the way to the Indus river in India.
Alexander the Great's empire went as far east as Central Asia and western India (today's Pakistan).
To today's Pakistan.
To Egypt and the Indian Ocean.
He got as far as the Beaz river.
Alexander the Great's empire reached from Macedonia and Greece to all the way in northern India.
From Eastern Europe to Egypt and Persia (Iraq, Iran, etc.)
The Beas River in the Punjab.
Alexander the Great's armies conquered land as far east as modern-day India. His campaigns extended through Persia and into the Indian subcontinent, notably winning the Battle of the Hydaspes against King Porus in 326 BCE. This expansion marked the farthest reach of his empire before his troops, weary from years of campaigning, ultimately refused to march further east. Alexander's conquests significantly influenced the cultural and political landscapes of the regions he encountered.
As far as I know there was no ..."pension" (lol) empire that any greek leader conquered. In case you meant Persian Empire, it was Alexander the Great who conquered it.
Historians who were there say that this is because Alexander's soldiers refused to follow him any further east - the end of the Persian Empire was far enough for them.
Alexander Ular has written: 'A Russo-Chinese empire' -- subject(s): Chinese Civilization, Eastern question (Far East), Foreign relations, Civilization