I’d resurrect the testudo, the tortoise shield formation. In software, that’s the defensive micro‑service mesh—each node guards its own perimeter, the whole cluster stays impervious to external attacks. It’s all about layered armor, not fancy cloud tricks. It works if you’re willing to commit to strict boundaries and fail‑fast policies, just like the Greeks did. If you can’t handle that, the Spartan phalanx was only good when you had a single, well‑trained line, not a distributed system. So pick the testudo if you want a modern sprint that actually survives the storm.