The Silver Branch is a historical adventure novel for children written by Rosemary Sutcliff and first published in 1957. Set in Britain in the last decade of the third century AD, it is the story of two cousins in the Roman legions who find themselves in the intrigue and battle surrounding the struggles between Carausius, a self-proclaimed emperor in Britain, Allectus, Carausius’ treasurer, and Constantius, emperor in Rome.