He did not unite Europe. He was the most blood thirsty dictator of his era and tried and failed to conquer the entire world with military force.
He established a new set of laws based on reason rather than tradition.
Not much, just conquer most of Europe, build the greatest empire ever seen, build the second largest empire ever seen, build the longest empire ever seen, have a large navy and army, conquer parts of europe, asia and Africa. Create a legacy that lasted over 2000 years, inspire other empires to relate to Rome, e.g. Eagles with Napolean, Holy Roman Empire(which didn't continue the empire) and kill a lot of people. Rome also built the colosseum which still survives today.
he foundhis empire in europe
Napolean
Napolean
Napolean III
Toussaint Louverture forced Napolean Bonaparte to abandon plans for an American empire
Napolean Bonaparte
The holy roman empire
from 1799 to 1815
Napolean Bonaparte
by having sex
Alexander built his empire on the continents of Europe, Asia and Africa.