I want our military to have such an enormous advantage over any other such that other countries won't even bother to think about competing with us, let alone compete with us. Unfortunately, Obama didn't understand that important strategic principle, and now we have more of an arms race against China, and perhaps Russia, Iran, and North Korea, than would have been necessary.
Even now, in confronting North Korea, Trump has had to recall reserve pilots in order to provide the show of military force necessary to drain North Korea's resources (by keeping its military on constant alert) and frighten it into compliance.
Also, the US military has traditionally sought a the capability to fight two wars on opposite sides of the globe at the same time. We do not currently have that capability, so that if we do get into a major conflict somewhere, our enemies elsewhere will be able to take advantage.