Out of concern that the right wing might cause an irreparable split within the Sangkum and might challenge his domination of the political system, Sihanouk set up a "counter government" (like the British "shadow cabinet") packed with his most loyal personal followers and with leading leftists, hoping that it would exert a restraining influence on Lon Nol. Leftists accused the general of being groomed by Western intelligence agencies to lead a bloody anticommunist coup d'état similar to that of General Suharto in Indonesia. Injured in an automobile accident, Lon Nol resigned in April 1967. Sihanouk replaced him with a trusted centrist, Son Sann. This was the twenty-third successive Sangkum cabinet and government to have been appointed by Sihanouk since the party was formed in 1955.