Greetings. I won't yell at you but you still suck at English grammar. You don't suck at writing per se though, because this excerpt - once deciphered - could make an interesting opening in a story. The setting is one most of us are unfamiliar with, so that would surely spark some curiosity and attract readers. I also like the conflict you chose to create between the protagonist and his comrades, and the reason behind it. Letting the soldiers explain it to a new member while arguing with Jaber was also a good way to avoid an info dump.
Those were the positives (well basically the whole plot is the positive), now with the things that are not alright:
Grammar. You misused some words and expressions ('bawls' instead of 'balls', 'astonished by the engine uproar', 'nodded him to stay quiet', 'crumbled into the truck' etc), had a couple problems with punctuation (i.e. 'The tough son of a bitch!' sounds strange to me) and for some strange reason decided to write the names in all caps. There are also other errors that I haven't listed here, but I just wanted you to understand where you have to improve (namely, in the English language).
I'm an ESL myself and I've found that reading English things (books, articles, forum threads) really is the best method to improve your writing skills in this language, because it teaches you how those grammar rules you learned are used by native speakers, and you can see the language in action. This actually applies to all languages, not just to English. I can't imagine how difficult it is to switch from Persian to English, but I'm sure you can improve.
Out of curiosity: do all Iranians still refer to Iran as Persia? I'm honestly interested.
Edit: I've apparently beaten both Leora and Mayana to it, where's my medal wait for their reviews because they'll probably be more detailed and helpful.