One of the more curious illusions of the putschists (especially in the light of subsequent revelations of the far-ranging activities of the C.I.A.) concerns the possibility of an American role. At the time, rumours of clandestine United States involvement ran extremely strong in France. Undeniably, during his time at N.A.T.O. headquarters the popular Challe did make firm friends of a number of high-ranking United States generals, who made no secret of their aversion to what de Gaulle was doing to N.A.T.O., going so far — over a plethora of Scotch — as to express enthusiasm for anyone who might rid France of her turbulent president, or, at least, force him to change his tune.

XREF: Connects to broader history of CIA covert operations abroad during the Cold War era.

Horne, Alistair, A Savage War of Peace- Alge…, loc. 1351