>>64397078
>limited objective
>massive, overwhelming force
>surprise

Also, it was, like any invasion, a close-run thing. Going from memory, the attempt to rescue a bunch of political prisoners carried out by special forces was particularly harrowing, due to heavy AAA presence on the helicopters' flight path. The speed and surprise the US achieved came at the cost of the entire invasion being a rush job. Divine intervention probably kept it from turning into a grand scale Desert-One style clusterfuck.