Compléter invasores Version en ligne four invaders of England par Oscar Renato 1 Celts Britain Saxons army Britain Germany 55 Germans Ireland Britain Romans 700 Iberians Caesar 410 Julius Jutes Angles tribes They were the prehistoric inhabitants of the Great . the settled along the western and southern parts of , and then spread further north as well as to . The seconds invaders the began to arrive from north - west from B . C . The Celts were technically advanced and they lived on fishing , hunting and agriculture . In BC , Celtic Britain was in turn invaded , this time by the under . Caesar's two invasions did not conquer Britain , but established it as a major trading partner of Rome . As the Roman Empire declined , its hold on Britain loosened . By AD , Roman forces had been withdrawn , and small , isolated bands of migrating began to invade . There seems to have been no large " invasion " with a combined or fleet , but the , notably the , , and , quickly established control over modern - day England .