read this if you're stuck - or just curious. ;)

Mission 1
Rush buildings and get as close as possible to them, you want to not only destroy them but take focus off the riflemen and onto you.

If the riflemen survive, they join your team.

Mission 2
Stay back, let enemy come to you and backup when required. simple.

Mission 3
First convoy drives right through the middle of map where you are. just wait for them. Kill them quickly, then turn and drive to the beach road, where the second convoy comes in.

Don't worry if you fail this mission, doesnt end game, just provides bonus resources.

Mission 4
Rush to outpost, take out the jaegers first and then mortars. At least ONE medic truck must survive. Again use your tank as shield if you still have it.

Mission 5
First part easy, get resources, build at least 3 mg nests towards the water. You'll need these to hold down the incoming jaegers from destroying your tanks. The rest is easy.

Most people lose tanks at this stage, no big deal, you want rangers (who jump out when tank dies) for last mission ideally.

Mission 6
Look for medic trucks, heal rangers and any other troops you have. Steal mortars from dead allies, use them to take out MG nests.

Avoid tanks, especially the 3 panthers.

Simply let your AI allies open a hole in the defenses, follow through with your mortars and rangers, take out officiers.

Keep in mind, officers will retreat into church when down to 50% health. Hopefully your have grenade to help at this point.