"the Rhodesian Fire Force teams used to carry out in one day (I think at a push they could manage 3) - all dropped from low level in close co-ordination with heli-borne troops, armed helis and (if within range) arty and CAS. Year after year of tactically - and occasionally strategically - successful para ops."
but no anti-air or defending airpower to overcome. . Lets face it - in the modern world a para attack against even third rate armed forces would make Arnhem look like a tea party.
You stand a chance against terrorists or guerrillas but many of those have reasonable antiair capability these days