This is completely ludicrous. There is no military threat to the US beyond nukes. Nuclear weapons have obsoleted wars between great powers. Tiny countries are zero threat to the USA. They cannot invade; they can do almost nothing. At best, they can kill a few hundred individuals at a time by sponsoring terrorism, far fewer people than are killed by vehicles in an average June.
The reason the USA starts wars in far away countries is to maintain a sphere of influence and protect a philosophy of government and running economies that keeps the USA affluent via trade. It is not, in no way, about defense of the USA; if you really think that, you've been deeply hoodwinked by some military warrior code bullshit. The USA's military program is foreign policy for, ultimately, economic reasons.