Came across this recently:
I don't have a date for the source...am wondering if this actually happened? It's very Strangelovian.
It took a while to surface, but it appears that a long-distance credit card may have saved a U.S. Army unit from heavy casualties during the Grenada military rescue/invasion. Major General David Nichols, Air Force ... said the Army unit was in a house surrounded by Cuban forces. One soldier found a telephone and, using his credit card, called Ft. Bragg, N.C., telling Army officiers [sic] there of the perilous situation. The officers in turn called the Air Force, which sent in gunships to scatter the Cubans and relieve the unit.
-- Aviation Week and Space Technology
I don't have a date for the source...am wondering if this actually happened? It's very Strangelovian.