He said it's not surprising the Vikings' violent side has been emphasized in accounts from countries they raided.
"If your monastery is being burned down, you don't take time to admire the beautiful jewelry won by the people burning down your monastery," he said.
Williams said the exhibition would not adopt a "fluffy bunny" approach or try to sanitize the Vikings, but would present a rounded view.
Exhibits include richly decorated weapons and treasures such as the Vale of York Hoard, a collection of gold and silver objects found in northern England in 2007. William said the trove includes Irish jewelry and coins from Afghanistan and Uzbekistan "the whole of the Viking world in one hoard."
The exhibition is co-created with the National Museum of Denmark where it is on display until November and National Museums in Berlin. It runs at the British Museum from March 6 to June 22, 2014, and moves to Berlin in September 2014.
Williams said transporting the fragile remains of the Viking ship, whose ancient wooden beams are held in a modern steel frame, was surprisingly straightforward.
"As one might expect of a Scandinavian-designed ship, it comes flat-packed," he said.
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Jill Lawless can be reached at http://Twitter.com/JillLawless