Ammunition Resupply Under Fire Has No Reliable Autonomous Solution

When combat units are engaged with the enemy and their ammunition runs low, resupply must occur under fire. This is one of the most dangerous and critical operations in ground combat. Currently, ammunition resupply to forward combat positions is performed by soldiers driving trucks or carrying ammunition by hand under direct and indirect fire. In the wars in Iraq and Afghanistan, ammunition supply points and resupply convoys were high-value targets for ambush and IED attack. In a peer conflict with precision artillery and loitering munitions, the problem is orders of magnitude worse — any vehicle moving in the open is detectable and targetable within minutes. This matters because ammunition expenditure rates in high-intensity combat are staggering. A single infantry platoon in a sustained firefight can expend its basic load of rifle and machine gun ammunition in under an hour. An artillery battery firing in support of a defensive operation can exhaust its ready ammunition in less than 30 minutes. When ammunition runs out, units die or surrender. There is no more fundamental logistics imperative than keeping ammunition flowing to troops in contact, and there is no more dangerous logistics mission than delivering it under fire. The Department of Defense has invested in autonomous resupply concepts — ground robots, cargo drones, and autonomous convoy systems — but none have been fielded at scale for ammunition delivery under fire. The challenges are severe: ammunition is heavy (a pallet of 155mm rounds weighs over 2,000 pounds), the delivery point is a moving and contested location, and the autonomous system must navigate terrain, avoid obstacles, and survive enemy fire. Small cargo drones can deliver limited quantities of lightweight supplies but cannot handle the tonnage required for ammunition resupply. This problem persists because autonomous ground and air delivery systems are still immature for contested environments. Commercial autonomous vehicle technology assumes GPS availability, mapped roads, and the absence of people trying to destroy the vehicle — none of which apply in combat. Military-specific autonomous systems must operate GPS-denied, navigate off-road, and survive kinetic attack. The technology gap between commercial autonomy and military requirements is enormous, and defense R&D budgets for autonomous logistics are a fraction of what is spent on autonomous combat systems. Structurally, the defense innovation ecosystem prioritizes autonomy for killing (autonomous weapons, drones, targeting) over autonomy for sustaining (autonomous resupply, logistics, maintenance). The glamour and funding flow toward combat applications, not logistics applications. DARPA and the services have programs like the Autonomous Multi-Domain Adaptive Swarms (AMASS) and various robotic mule projects, but these are technology demonstrations, not fielded capabilities. The soldiers who will fight the next major war will resupply ammunition the same way their grandfathers did — by driving trucks into the kill zone.