Challenging mission - indeed. I just finished it after many, many fruitless tries. I missed a save game feature (for full version, not demo), so that I could skip the meeting with the informants - but beside that, it was lots of fun!
SPOILER
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My tactic was to speed 90 degrees to the east, after meeting with the scouts. Driving as fast as possible, until I reached a mountain, from which I could overwatch the village, the escape route of the jeep and the approaching T-55. It's an ideal position, but nevertheless my tank limped home, after I tried to knock out all enemy armor. I doubt that my tank would've taken one more hit ... BTW, I finished a damaged T-34 with the AA gun on my way to the checkpoint to end the mission (distance approx. 500 meters/all other ammo were out); hit it several times in the front arc - is that realistic? I thought the armour should have protected it against smaller bullets?