Developed to turn USMC C-130s into close air support platforms during the Global War on Terror, Harvest Hawk's relevance has waned.

On a muddy Ukrainian training ground, a low-slung off-road buggy now carries one of the most recognizable American missiles, turning a recreational chassis into a mobile hunter of Iranian-made drones.

The Hellfire missile is cheap and effective—but critics allege that it has given rise to a culture within US military leadership of using lethal force as a first resort. President Trump’s kinetic ...