The CIA was said to have been heavily involved in trying to overthrow De Gaulle for lots of reasons ranging from their involvement in Algerian dependence, the plethora of oil in Algeria that they too wanted and also because De Gaulle was against the Vietnam War. Maybe the most Game of Thrones way of trying to kill him was apparently with a poisoned ring. The CIA was approached by French dissidents who wanted their help in poisoning a ring that an old soldier would wear to a military event. After shaking his hand, De Gaulle would fall down dead and the killer would simply walk away. The event never went ahead.