The Romans
invaded Britain in AD 43 and,chasing ancient Britons along the
Thames ,they came to the first place where it was easy to
cross.They built a garrison there -and London was born.They
also erected a bridge over the river.The
garrison became a major trading post.Later,(9)---------
suffered neglect and the whole area was raided by the Vikings .In AD 886Alfred the Great drove out the raiders, the bribge was repaired and the
city prospered again. hundred years later,the
Vikings returned but King Ethelred sailed up theThames, attached
ropes to London Bridge, headed downriver and pulled it down.