This reminded me of a post-apocalyptic Special Forces.
This story is executed in a bit of an unconventional way. Non-linear timeline, bare bones characterisation of everyone but the narrator, major plot elements delivered in a dense, factual way ... It's the kind of story where you are thrown into the proverbial deep end and asked to swim or drown. It's up to you to take the challenge.
Just a side note: I've only read this and An Immovable Solitude by this author but I truly believe she can do great things on the page if she wants to. I would like to see a third-person POV story by her; I think it would help bring out her full writing potential.