This someway reminds me of the Matrix films. You can even take some inspiration from the Matrix plot:
Machines evolve and become intelligent, then they reveal against humans. When humans realize what is happening, they try to destroy the Machines by exhausting their energy resources. But then, the Machines learn a way to gather in energy from the human bodies...
Sentinels could also be a nice idea for a fast close-range air unit. And this shouldn't be a big deal to find a 3d model for it.
This someway reminds me of the Matrix films. You can even take some inspiration from the Matrix plot:
Machines evolve and become intelligent, then they reveal against humans. When humans realize what is happening, they try to destroy the Machines by exhausting their energy resources. But then, the Machines learn a way to gather in energy from the human bodies...
Sentinels could also be a nice idea for a fast close-range air unit. And this shouldn't be a big deal to find a 3d model for it.