Desert Rats DLC There are also the new kinds of desert terrain to talk about, but the more important feature to me are the defense missions. Unity of Command II isn't that fun on the defense, especially if you're on the losing side. In fact, the game skips about a year until 2nd Alamein. But still, unavoidably, quite a few defense missions do exist! They demand careful husbanding of resources, understanding just how the combat system works on the defense...