The US Army's Robotic Combat Vehicles face uncertainty due to shifting Pentagon priorities.Four prototypes were developed for the Army's future ground robotic systems plans.The concept of Robotic Combat Vehicles was envisioned as uncrewed and revolutionary for ground warfare.Concerns arose over the vulnerability of costly combat vehicles to drone attacks.The Army reconsidered the development of autonomous light tanks amid drone threat evaluation.Initially planning three variants, the Army later focused on the RCV-L only.A shift was made to infuse technology and reduce overhead for battlefield readiness.Prototypes like Textron's Ripsaw M3, GDLS's TRX, McQ's WOLF-X, and Oshkosh Defense's RCV were under consideration.The Textron Ripsaw M3, equipped for various missions, was reportedly selected for the RCV program.General Dynamics Land Systems TRX and McQ WOLF-X were also proposed for Army's robotic combat vehicle consideration.