It is hard to think what would really happen if most of the rank and file in the military ever goes woke.

If they drink the Kool-Aid of an ideology which so fervently fetishizes weakness & victimization, and is so prone to infighting, as contemporary intersectional leftism? I think the answer to that's quite easy, actually. Think more 470s Rome than the 1940s USSR: entire divisions comprised of ethnic groups that hate the country they serve and are expressly loyal to their race's interests, unable to fight as a coherent force against any outside enemy and (far from being effective at suppressing unrest) more likely to start civil wars, between themselves if nobody else as black and Latino (for example, you can also substitute 'female and Muslim' or any other conceivable combination) interests start clashing.

No doubt this will greatly benefit outside barbarians, in today's case, the likes of Red China and Latin America.