Germany, England, Scotland, Iberia, Northern Africa, Rome, Sicily, Naples, Russia, Ukraine, Byzantium...
Normandy was founded by Rolf the Granger who was exiled from Norway for murder. He went into exile with some young tough guys who decided that Northern France was ripe for conquest because it was populated by Frenchmen. In the spirit of Gallic collaboration/capitulation the King agreed to recognize the Northmen’s claim to Normandy if they recognized the sovereignty of the French King.
A small landholder with too many sons Tancred de Haughtville, sent them down to Italy to become soldiers of fortune. Seeing that they were the only real warriors in southern Italy at the time they decided to take it over (actually meeting the Pope’s army in battle and defeating it) as well as undertaking a conquest of Islamic Sicily and an attempt to conquer Byzantium (at the time probably the largest and most powerful empire in the world).
William the Bastard of Normandy became William the Conqueror when he defeating the English and instituted Norman rule of England.
When the First Crusade came, Bohemund and Tancred, two Norman Princes, joined the fight and claimed the Crusader Kingdom of Antioch (one of the largest metropolises of the ancient world).
Bohemund also fought to take over Byzantium, and like his father came within one battle of winning, ironically at the same location!
Thus a small landholder in Normandy, Tancred de Haughtville’s children became the Norman Rulers of Normandy, England, Southern Italy, Sicily, and Antioch.
They really got around, didn’t they?