Command & Conquer/Austria or Slovakia

There are two choices here.

Repair
This is a very easy mission, relative to your current level of expertise, if you have got this far, although it is much harder than the first scenario. There is no point in providing a detailed walkthrough, but there are some points worth noting.

1) You now have the use of Rocket Launchers and Repair Bays, although you cannot produce any vehicles or buildings until the end. Nod now gets mobile artillery. It requires no great stretch of the imagination to understand that you should attack these units with your armour, and keep all your other units far away.

2) The scenario gets easier and easier as time passes, as you push the edge of the visible region forward, especially when you find the choke points, one in the west and one in the east. Eventually, you learn that the Nod base has only one exit, and then you can really bottle them up.

3) Nod has 3 SAM sites. Two of them are trivial to take out, but the third one, in the far NW, presents a bit of a challenge, albeit nothing serious. If you take out the SAM sites, then you can bomb the Nod base with impunity. Keep in mind that Airstrikes are only effective against infantry and other soft targets. However, Nod does use batches of infantry ... :)

4) You could certainly do a frontal assault on the intact Nod base, if you like losing troops. It is to be hoped that you do not throw away your irreplaceable vehicles doing this, but you do have enough money to buy hordes of infantry. On the other hand, you could shell the Nod base from the surrounding hills, a la Dien Bien Phu.

5) Nod has a Construction Yard hiding in the far NW corner of the map. This means that, no matter how many Nod buildings you destroy from range, they can always be quickly replaced.

6) It won't be long before the Nod Harvester comes out to play. You could certainly pick it off, but there will be a massive response. You have been warned. And BTW, Nod can replace their Harvesters in this scenario.