This is a cool mission. You get to use spies for the first time and utilize their devastating potential. Though we won't see the awe of rolling an army in behind a spy we get to see the precision strike that these covert agents can create when combined with Tanya. First, you must disguise your spies. There is a small group of Soviet soldiers south of your location, just select a spy and click on one of the enemy infantry. The spy is now disguised. Keep in mind that guard dogs can smell out your spies, and when they do the spies are defenseless. So, advance slowly with Tanya, taking out any units you see until you get to the Soviet base. Keep the spies nearby, but never so close that they are in danger. Let Tanya protect them. A lot of times when I'm using Tanya I like to keep my finger ready on the S key (stop unit). When she stops, she'll automatically shoot any enemy units in range. This is a great move defensively, and is really useful on this map. When you get to the base notice the right tesla coil has those steel barrels we saw in the first mission. Blow them up with Tanya's guns and you've exposed a hole in the enemy defense. Walk carefully into the base remembering that the other tesla coil is still active and eliminate any resistance there. Take your spies in behind tanya and send one into the tesla reactor. Spies can shut off power in this way.

Now you have about 45 seconds to take out the northernmost tesla coils so you can advance to the next section of the map. I had one spy remaining at this time, but we get more. Continue advancing with Tanya, Our first destination is the base to the northeast. There is a spot on the southwestern wall of this base which has those explosive barrels. Tanya can take out this base without the help of a spy. Afterward, Tanya should proceed west toward the second part of this base, stopping if any danger approaches of course. Bring the spy along when you're sure it's safe. Destroy the wall section here and you'll reveal another spy vulnerable power plant. This can be difficult, but if you're quick it can be done. You don't have to destroy everything, just the Nuke.