Theatre of War 2: Kursk 1943 (from Battlefront) is 
entertaining and manageable for a WWII RTS. You get a bird’s eye view of the field of battle and can move the camera around to get a better view of the situation. The tasks are relatively well laid out and you are given a fair amount of information on what you need to accomplish but not exactly how to do it. Each battle generally has multiple goals and offers a lot to do and see.
There are some interesting features in the game as well. Soldiers will automatically pick up ammo and better weapons from fallen soldiers and comrades. That means that you could end up with far better troops than you began with. This can be done automatically or you can micromanage it if you so choose.
Additionally, after each battle you’re able to upgrade attributes of soldiers that survived and distribute experience points among them to make them better over time. That is if any survive and you manage to win. It doesn’t really seem to have a huge impact on the game as far as I can tell. Perhaps later, when you have units survive through numerous battles, they might actually do better. But it just seems negligible.
Sometimes though, the game is totally frustrating. I was to assault enemy positions and take over control of them. But once I got into the level, after having deployed my troops, it then said I had to do so with infantry, which I obviously didn’t have enough of because I think I lost. Or I won, I’m not really sure. That’s another flaw in the game. It gives you a message stating that you’ve failed but then moves you along to the next mission. I would think after several failures in the Nazi Germany army, you would simply have been executed for incompetence.
