The US Army's new climate strategy introduces the possibility that heavily armed vehicles like an Abrams tank could be integrated with hybrid electric propulsion. This brings a number of key advantages.

But if a tank can travel further into enemy territory behind enemy lines and close with an enemy, without needing as much of a logistics trail as much fuel, it can certainly be much more tactically effective and be able to implement an effect or have an effect on an enemy in the battlefield. Also, hybrid electric propulsion allows for something called Silent watch, where a tank can conduct clandestine missions without having to emit an acoustic or infrared signature be a lot less detectable to an enemy.

The process will evolve slowly, but the army is very much in the early phases of making this happen.