In the late summer of 1066, the Norwegian-led invaders sailed up the Humber River, then the Ouse before advancing on York. When they landed at Riccall, this was when Godwinson first learned of their invasion. her On 20 September they defeated a northern English army led by Edwin, Earl of Mercia, and his brother Morcar, Earl of Northumbria, at the Battle of Fulford. Following this victory they received the surrender of York. They briefly occupied the city and took hostages and supplies from the city. Then they returned to their ships at Riccall. Hardrada offered peace to the Northumbrians in exchange for their support for his bid for the throne. Then he demanded more hostages from all of Yorkshire.