Alex wrote on game forum War Thunder
Questions about Quest 6. Killing a lot is my only way i can give you to level up fast or you could go with a bomber plane and destroy AAA's but I haven't tried that yet so I cant confirm it's good, and yes 31 days is more than enough time to complete the quest. Just for reference you need 170,000xp in total to get level 9, you can see your xp below your level just pointing your mouse at the "/" thingy. I could not find how much xp I needed to get level 9 and I completed the quest blindly without knowing how much xp I need, and now that i need to get level 12 I'm completing it blindly too. If someone knows or find a website about it pls send it, it would be very appreciated.