Let's say that, theoretically, a civilization is capable of utilizing wormholes for travelling to the stars, this wormholes, eventually get turned into a device that can be used as for travel, as a war machine.
I don't know the limitations of wormholes, if they have mass, spin or other properties, but let's assume a relatively realistic wormhole.
This wormhole can be opened anywhere, space and even in atmosphere. What would be the implications and changes in warfare this device will induce?
Would it make space warfare irrelevant thanks to being able to destroy anything with the gravitational pull of the Wormhole? Would wormholes be used on atmosphere and change ground warfare? Would be ever a counter for them?