 Complete the following phrase:  North Sea has provided waterway access for commerce and conquest. Many areas have access to the North Sea because of its long coastline and the European rivers that empty into it. There is little documentary evidence concerning the North Sea prior to the Roman conquest of Britain in 43 CE, however archaeological evidence reveals diffusion of cultures and technologies from across or along the North Sea to Great Britain and Scandinavia and a reliance by some prehistoric cultures on fishing, whaling, and seaborne trade on the North Sea. The Romans established organised ports in Britain, which increased shipping, and began sustained trade and many Scandinavian tribes participated in raids and wars against the Romans and Roman coinage and manufactures were important trade goods. When the Romans 