Where did the final battle of the revolutionary war that ensured american independence take place? a. boston b. saratoga c. ticonderoga d. yorktown

The battle of the Revolutionary War that ensured American Independence occur in Yorktown 

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

Crop irrigation, bathing and drinking water, fish for food, the reeds growing there furnished materials for building and paper. the river was also used for transportation.