Why did the dutch leave delaware and who took over?

The Delaware watershed was claimed by the English based on the explorations of John Cabot in 1497, Captain John Smith, and others, and was given the name held as a title by Thomas West, 3rd Baron De La Warr, the governor of Virginia from 1610 until 1618. At that time the area was considered to be part of the Virginia colony.However, the Dutch thought they also had a claim, based on the 1609 explorations of Henry Hudson, and under the auspices of the Dutch West India Company were the first Europeans to actually occupy the land. They established trading-posts: Fort Wilhelmus in 1624 at "Hooghe Eyland" (High Island), now Burlington Island, opposite Burlington, New Jersey; Fort Nassau, near Gloucester City, New Jersey, in 1626; and at Zwaanendael, now Lewes, Delaware, in 1631.[2] Peter Minuit was the Dutch Director-General of New Netherland during this period and probably spent some time at the Burlington Island post, thereby familiarizing himself with the region.

In 911, a group of vikings lead by rollo besieged paris and chartres. after a victory near chartres on 26 august, charles decided to negotiate with rollo. the talks were led by hervé, the archbishop of reims. this resulted in the treaty of saint-clair-sur-epte, which granted rollo and his soldiers all the land between the river epte and the sea. it also granted him brittany, "for his livelihood". at the time, brittany was an independent land which france had not been able to conquer. in exchange, rollo promised the king his loyalty and military assistance when needed. also rollo also agreed to be baptised and to marry gisela, the king's daughter. the territory given rollo is about the same as upper normandy. this would grow to become normandy under rollo's descendants. - wikepedia