Hyundai is envisioning the future of warfare with its next-generation main battle tank, the K3. This tank, powered by a hydrogen fuel cell, is designed for stealthy combat on the battlefield. Equipped with autonomous functions and radar-absorbent paint, the K3 boasts a futuristic design with a 130 mm smoothbore main gun. The tank's modular steel, ceramic, and composite armor offer advanced protection. Additionally, the K3 features the capability to deploy drones for reconnaissance missions, enhancing its tactical versatility. While there were initial suggestions of the tank being unmanned, recent reports indicate it may support a crew of three. The K3's development timeline indicates completion by 2030, with potential deployment by the Korean military by 2040. Initially, the tank may feature a diesel engine alongside a hydrogen fuel cell, ultimately transitioning to solely hydrogen power. This shift not only benefits the environment but also reduces the tank's thermal signature, making it harder for adversaries to detect.