The Early Invaders of Britain were the Saxons, Picts, and Horsa. The Saxons were a Germanic people who invaded Britain in the 5th century AD and established several kingdoms. The Picts were a Celtic people who inhabited what is now Scotland and northern England. They were also known as the Picts and were active in the 5th century AD. Finally, Horsa was a legendary leader of the SAXON invasion of Britain in the 5th century AD. He is believed to have been a real person, although his exact identity is unknown.