Armored knights vanished when gunpowder weapons made them ineffective, and cavalry vanished when motorized transport and tanks arrived on the battlefield. I believe infantry will likely be the next category of warriors to disappear. History shows that survival, cost-effectiveness, and competitive advantage dictate military force composition—not tradition. The lessons are clear: when a combat role becomes too costly and too vulnerable compared to alternatives, it disappears. I will explain why trends in battery technology, robotics, and artificial intelligence are converging toward a point where humans will not be able to survive in front line combat. In their place, armies of robotic combatants will clash on future battlefields, and their deadly potential will alter geopolitics, for good or ill.

Human Frailty

The human soldier has many drawbacks. He or she is difficult to train, costly to maintain in peacetime, and difficult to sustain on the battlefield. Soldiers vary in health, strength,