User blog comment:101stranger/Ah, the wonderful world of UNSC infantry weapons/@comment-4791664-20100405193028

Err, you wouldn't entirely replace Human soldiers for several reasons. Machines can't learn from experience, they can't communicate with each other efficiently and meaningfully, and quite simply, they lack the "Human Element" that makes skilled soldiers. Thus, in all likelihood, while drones may support regular infantry, they wouldn't entirely supplant them.