Which group of people Concord Britain after the Romans left the island? Please help due today

Which group of people Concord Britain after the Romans left the island?

Angles, Saxons, and Franks after the Romans left Britain, with minor rulers, while the next major ruler, it is thought, was a duo named Horsa and Hengist. There was also Saxon king , the first who is now traced to all royalty in Britain and known as Cerdic.

would it be plagiarism to copy and paste off of here? ?

answer; regard the action of other people negatively;