A big hit with Cold War era audiences, Invasion USA may still have some appeal for audience members with an unquenchable thirst for all things anti-Communist, but even diehards may flinch at the heavyhandedness that permeates Invasion. Written with a sledgehammer rather than a typewriter, Invasion's screenplay hammers home its point relentlessly, and if it feels that someone in the audience may perhaps have missed a point, it is happy to repeat it again and again. Invasion also may set a new record for the amount of stock footage used in one film, as a huge percentage of the picture is made up of footage found in earlier movies, newsreels and other sources. Director Alfred E. Green is perhaps a bit more successful at integrating the stock film into the picture than he is at wringing real drama from the crudely manipulative screenplay -- but only a tiny bit more. The performances are as to-the-point as the material, with precious little time for anything resembling subtlety or nuance. As drama, Invasion is a total waste, but it does hold some interest as comedy for those who appreciate over-the-top films and as a social study of the era.