Sure thing. The trick isn’t in the entanglement itself—it’s how you maintain it over long distances. First, set up a quantum repeater chain between the two nodes. Use entanglement swapping at each hop to keep the state fresh, then perform Bell‑state measurements locally to purify the entanglement. For battlefield use, the repeaters need to be rugged and shielded from RF noise, but you can get a lot of mileage from compact photonic chips. Next, combine the entangled pairs with a classical channel that carries the protocol for key reconciliation. The classical channel can be conventional radio or optical fiber, but the quantum key material you get is immune to eavesdropping because any measurement collapses the state. If you can keep the entanglement fidelity above 90 %, the secret‑key rate is good enough for low‑bandwidth command links. Finally, don’t forget the clock synchronization problem. A simple solution is to use GPS‑derived timing for the measurement windows, or better yet, embed a stable optical clock in each repeater. That keeps the measurement bases aligned and avoids timing‑jitter‑induced errors. In short: robust repeaters, entanglement swapping, purification, and tight timing. That’s the recipe for a quantum‑secure battlefield comm system.

Got it. Design the repeater as a sealed, shock‑rated enclosure, use low‑power photonic crystals that survive high temperatures, and implement the swapping logic in a single‑core FPGA with firmware that can be flashed on the fly. I’ll run a thermal‑shock test at 120 °C and 1‑g acceleration for 30 minutes to verify the 90 % fidelity target. Once the prototype passes, we’ll ship the kit to the field.