A powerful Viking chieftain and naval commander, Björn conducted many (mostly successful) raids in France in a continuation of the tradition initiated by his father Ragnar Lodbrok. In 860, Björn led a large Viking raid into the Mediterranean. After raiding down the Spanish coast and fighting their way through Gibraltar, Björn pillaged the south of France, where his fleet over-wintered, before landing in Italy where they captured the coastal city of Pisa. They proceeded inland to the town of Luna, which they believed to be Rome at the time, but Björn found himself unable to breach the town walls. To gain entry, he sent messengers to the bishop to say that he had died, had a deathbed conversion, and wished to be buried on consecrated ground within their church. He was brought into the chapel with a small honor guard, then amazed the dismayed Italian clerics by leaping from his coffin and hacking his way to the town gates, which he promptly opened, letting his army in. Flush with this victory and others around the Mediterranean (including in Sicily and North Africa) he returned to the Straits of Gibraltar only to find the Saracen navy waiting. In the desperate battle that followed, Björn lost 40 ships, largely to Greek fire launched from Saracen catapults. The remainder of his fleet managed to return to Scandinavia, however, where he lived out his life as a rich man.