I mean, yeah, but I think that’s placing the US military on a pedestal, with the unsaid implication that they’re somehow unique in that regard.
I don’t imagine there’s many, if any, military forces on earth, who would both be used to invade and occupy foreign lands, and not make similar decisions.
I think the real question is, what do you want to repurpose it for?
Because the answer to your question is yes, it is usable, but whether or not it’s capable of what you want to use it for, we can’t say without more information.
Linux installation appears to be possible. This is a wiki to an Arch on ARM distro, but you might want to look for something a bit more user friendly if you’re not comfortable with Arch.
https://archlinuxarm.org/platforms/armv7/rockchip/hisense-chromebook-c11#installation
Just remember, it’s a fairly low spec machine. Think of it like a Raspberry Pi with a keyboard and monitor built in, in terms of what you can hope to run on it.