 Before he departed for Bolivia , Guevara altered his appearance by shaving off his beard and much of his hair , also dying it grey so he would be unrecognizable as Che Guevara . On November 3 , 1966 , Guevara secretly arrived in La Paz on a flight from Montevideo under the false name Adolfo Mena González , posing as a middle @-@ aged Uruguayan businessman working for the Organization of American States . 
