The news of Harold being crowned King of England angered and infuriated William. After persuading his Counts and Barons to join him on this crusade, of which he had also managed to acquire Papal support, he sets about constructing ships to invade England. This image shows the construction of those ships. Note how similar they are to Viking longboats. The influence of Rollo and the Viking blood in them, made it almost impossible for them not to seek revenge.