London is supposed to have been the main reason for the successful invasion of Britain by Julius Caesar. According to the early British history Julius Caesar was successfully repelled by King Cassivelaunus, younger brother of King Lud. During the celebrations, in London, a dispute takes place, which eventually leads to Cassivelaunus, besieging London (Cassivelaunus’s capital would have been present-day St Albans). It was the Londoners fearing defeat who sent a message to Caesar asking him to come to their aid. They joined forces with Caesar and defeated Cassivelaunus.