Still have this on my HDD but been a while since I got it set up - 1024 from the look of my CombatAce mission report:
https://combatace.com/forums/topic/8...lkans-on-fire/
...but this might help, re the resolution:
https://steamcommunity.com/app/1670/...6318949815550/
Also this:
http://graviteam.com/forum/index.php?topic=11569.0
A 1.3 patch is still available over at battlefront.com, though the missions once there seem gone:
http://www.battlefront.com/index.php...=90&Itemid=135
There is or was a Russian site which had missions, if you search for it under T-72 Iron warriors as well as T-22 Balkans on Fire you may be able to find them. Some/all of them may be here:
https://gamefront.online/files/listi...lkans_in_Fire/