What were Lucius Cornelius Sulla 's accomplishments?

This Roman General and leader, who lived in the two
centuries before Christ, became an extremely skilled and accomplished military genius. 
His enemies hated but respected him.  He fought extensively for the Roman Empire in
North Africa when he was in his twenties, defeating armies that other Romans had failed
to conquer.  Amazingly, and testament to his skill, he never lost a single
battle.

He also fought in numerous wars for control of
provinces within the Empire and, on two occasions, marched on Rome itself.  He won the
Grass Crown, the Roman equivalent of the Congressional Medal of Honor and the highest
award given at that time, for his bravery in battle.  He was also very clever and
masterful politically, maneuvering himself into command positions, and at some points,
usurping unfriendly or dangerous governments and making alliances with
others.

In 82 B.C. he was appointed as dictator of the
empire.  This hadn't happened before except in emergencies, so his being chosen as sole
dictator was seen later as a legal precedent for Julius Caesar taking the
throne.