>But unlike the British colonial empire, the American sphere of influence is mostly comprised of sovereign countries whose governments might object to foreign-c

>But unlike the British colonial empire, the American sphere of influence is mostly comprised of sovereign countries whose governments might object to foreign-controlled guerillas operating in their territory primarily to protect American interests. I think their use of "foreigners" there just refers to non-British, as both of their examples largely used locals for that role. Countries are often quite willing to allow US officers in train and assist their army.