After the bad storm in France, William was able to come to the south of England but there was no one( Horld just won the Battle of Stamford Bridge). So William stared going in villages and killing all the peoples so he can get Horld's attention.
Finally Horld Godwinson and his tired soldiers come from the north of England (York) after he beated Horld Hardrada, to the south of England, to fight Normans.
Horld had an idea of making the Normans tired, by making them come up the hill and fight them. But the Normans started shooting arrows on them.