While it is possible to use nearly any camera drone for reconnaissance work, most of the consumer-grade aircraft on our list are not capable of advanced military drone security and operations. In particular, all consumer and commercial drones will soon be required to report their real-time location through the FAA and other flight systems, such as ADS-B. This means that anyone with a basic tracking app will be able to see the location of your drone, and the location of your controller. I can only imagine that you do not want to transmit your location on the battlefield.