A waste of money and effort, when the resources can just be spent bombing the bejesus out of the enemy.
Unless, perhaps, it could be used for recon missions. A single soldier is cloaked, and sneaks near the enemy base to get intel on forces and defences and such, while they can't see him at all. Then maybe he calls in an air strike or such. Or just snipes the leader in the head. I dunno.
Like a ghost in Starcraft. Life imitates art!
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