Is English your second language? I've spotted many errors, both punctual and grammatical.
That aside, your main problem is that the story plays out like a b- videogame storyline, there's no freshness to the story; nothing interesting. It feels like you are rewriting the movie "pearl harbor" in a different setting and with different characters. you have some kind of post apocalyptic future setting but you don't expand on it any further than "world war 3" and "oh, and nazi's too" which, while I am perfectly open to the idea that anything is possible in the world of pen and paper, America -one of 2 final military superpowers on earth(debatebly)- being taken over by a regime that ended in the late 1940's ("the nazi's are dead, and europe is RED!"
-pigwiththefaceofaboy) seems not only unrealistic but borderline absurd. What you have to do, and this will hurt a bit; is rewrite the universe where this story is set, swap out anything that seems remotely videogame-ey (that is, anything to do with an elite unit, advanced weapons, etc...) with things that either fortify/mirror/conflict with the personality or projections of the major characters. Your goal here is to cause depth; to evoke emotion in the reader by using scenes, actions and dialog in a specific way.
For instance; take your main character, John Verkia. John is the most common name on the planet, it is a favourite among game-devs when attempting to make a blank slate for the audience to project on to, but it doesn't match with John here because you've added 'Verkia' a russian sounding surname and a backstory of military service to him, which transforms your blank slate into a boring sounding macho 2d character. His quest to 'save the princess' as we'll call it, is a trope in both movies and bad games. such a thing only works when it tells you something about the character, take Liam Neeson's character in the movie "Taken" for example, the quest to find his daughter is the source of his determination, but also of his cruelty, and you begin to lose faith in him watching the atrocities he commits to find his daughter.
you also need to be far more descriptive in your writing, the scenes come off as boring and repetitive, you reuse words pretty often and by focusing on the moment, you fail to set the scene, which should always take priority. Scene THEN Moment, here's an example.
"Prepare yourself. The convoy will be here in 30 seconds." Lieutenant said on the radio.
The world around me rushed as men gathered their courage, the heat of the sun beat down on the makeshift encampment as if it too, was against us. I drew in a gulp of air calmly, listening to the minutia in my environment, the grass lightly swaying in the drawing wind, making a whispy sound not unlike the searing a bullet freshly landed into cover, or flesh. Birds foolishly settled in the trees nearby, unknowing of the concert to which they would be audience to, moments before the noise drives them to flee. Coldly I cycled through positions, thinking on which would give me the greatest advantage, who I would be with, and who would get in the way of gunfire.
I stationed myself behind a sandbag with a few other militia soldiers.
The setting of the scene makes the action of taking cover more interesting, see?
I know this may come off as a bit harsh, but you have the capability to do it. I would say the immediate thing you need to do is improve all aspects of your english; buy a book on punctuation and grammer, and then move on to structure. Practice writing short stories using a beginning, middle and end formula. READ MORE, this is one of the most important things, read more books, lots of books, and lookup any words you don't know, if you find yourself relying on a certain set of words, look them up in a thesaurus to find works like them (the internet is your friend here).
Don't despair, if you persist and practice, you will do far better