This mission is difficult. You have to defend Red Square against the
German atackers. There's alot of targets shootng at it, it may take you a
few times to get it down. One strategy I used was to let the tank
paratroops land. Once they hit the ground, they bunch up and are easier
to take out with a rocket or two. You'll be doing alot of that,
especially in the second half of the mission. Locate clusters of ground
targets and obliterate them with extreme prejeduce at maximum range. You
even get to call in artillery strikes. At one point in the battle, there's
a long line of German transports rolling toward the city. This is a great
time to use artillery support.

The end of the mission puts you up against a train-mounted howitzer.
Take it out fast, because it only takes three shots from it to destroy
Red Square. If you take it out after the third shot, but before the shell
actually damages the city, it counts as end of mission.