What year did alexander the great divide the empire into four kingdoms?

Alexander the Great (356-323 BCE) of Macedon first follwed in his father’s (King Phillip II) footsteps in subduing the city-states of Greece and then lead his army on a series of campaigns which successfully conquered the then-known world from Macedon, through Greece, down to Egypt, across Persia, to India. Alexander’s tutor was the Greek philosopher Aristotle (384-322 BCE) and, as Alexander traveled, he spread Greek thought and culture in his wake, thus "hellenizing" (to make 'Greek’ in culture and civilizaion) those he conquered. After Alexander’s death his Empire was divided among his four generals - the Diadochi or Successors.