Odd little thought. It seems to me the US military's weapon systems can be divided into two basic types. There are the "heavy" sort, designed for the Cold War with an eye to World War II-like scenarios. Big navy, big bombers, main battle tanks, all that kind of thing. These then turned out to be pretty much tactically useless against insurgencies of the type they dealt with in Vietnam, Iraq, Afghanistan etc., although still useful for intimidating and ravaging sovereign nations.
So in response, they have developed lighter more flexible approaches such as the much-touted and much hated drones carrying bombs. In a triumph for the US military, these are only strategically useless against insurgencies.