WI Willem the conkerer dose not betray Harald the Hard, King of Norway at the battle of stanford bridge and splits England between them, Willem in the south, Harald in the north.
Here are some things to consider.
Harald the Hard was a beliver in the old ways, a victory for him might prolong the old viking belifes.
Harald and Willem were both power hungry, peice might not last long,and if a war dose result, who would win?