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He later championed arming helicopters for battle, creating a sky cavalry that he helped implement in Vietnam for counterinsurgency operations.

Through old Tory Cave there surged the noise of a rising wind, silencing that weak gust afar off, now baleful, the sound of the hidden water; reverberating among the rocks, it might be taken for anything, for the hum of aircraft–for a perfect onslaught of sky cavalry!