Cambridge Five

The Soviet ring recruited at Cambridge that penetrated the British establishment

Overview

The Cambridge Five, Kim Philby, Donald Maclean, Guy Burgess, Anthony Blunt, and John Cairncross, were recruited at Cambridge in the 1930s and carried Soviet assignments deep into the British wartime and postwar state. They passed atomic, diplomatic, and NATO secrets across decades. Maclean and Burgess fled to Moscow in 1951, Philby followed in 1963, Blunt confessed secretly in 1964 and was exposed publicly in 1979. The affair traumatized Western intelligence, inspired enduring mole hunts, and forced vetting reforms on both sides of the Atlantic.