[Little Ray]

In retrospect, just what would the US Army have done with Goddard's work? Rockets like the V2 represented a enormous expenditure to inaccurately deliver a relatively trivial payload.
The V2 was annoying, but d@mn near useless. The V1 actually had more effect; since it could be intercepted, the pinned down significant resources in defense of the UK. Its payload was also more effective.

The same is true of jet aircraft. The German's were defending their homeland against fleets of bombers. This was an ideal role for the Me-262. Imagine trying do bomber escort and ground support with them, though!

[Travis McGee]

Not useless against certain targets, such as ports during offloading in the middle of an invasion.

[Tallguy]

In retrospect, just what would the US Army have done with Goddard's work? Rockets like the V2 represented a enormous expenditure to inaccurately deliver a relatively trivial payload.

Goddard's work was picked-up by the USN, IIRC. The Navy was looking for ways to launch propeller aircraft over relatively short distances while carrying a full fuel/bomb load. Goddard developed a liquid fuel booster rocket similar to the JATO (Jet Assist Take Off) rockets that were common in the 50's.