Really well done.
Fight scenes among the best I've seen ever for jets. Attention to details, sounds, camera work - all excellent. And interesting alternate history scenario - we don't see them often in sim movies.
But let me add some (friendly) critical notes:
- Soviet pilots didn't fly IL-10 in Korean War.
- Suicidal/kamikadze style has never been part of VVS tactics even in the worst periods of WWII (yes, many missions did end up as suicides, especially for bombers in 1941, but that was result of poor planning, not intentional).
- "while North Korea supplied aircraft". IL-10,probably. But MiG-15s could be supplied only by Soviets.
- did it take 4 hours for VVS assault group to reach Osan air base? (unless I misunderstood titles). What speed did they fly - 150 kmh? Anyway, 4 hours is above flight duration for both IL-10 and MiG-15.
- There was no evidence of VVS shooting US pilots who bailed out (or please prove if I'm wrong).
- in Russian soundtrack: "Fritz na khvoste!", that means Fritz(German) on your tail.
And two more (tongue in cheek):
... wonder why VVS ace would accept low level aerobatics fight at the end of war, when opponents were well aware of strong/weak sides of each other... but OK, may be no time to escape and climb up.

... Osan base not equipped with radars in June 1953? OK, assume main power blackout and empty tank at emergency generator..
Great movie anyway and worth to watch and to keep on a hard disk.
Thanks!