Mission 1
Get anti tank up fast. Otherwise simple. Just some half-tracks and riflemen.
Mission ends after few minutes

Mission 2
Secure towns. Light vehicles and troops patroling the areas. Get some at/troops. Secure capture zones around the area.
Mission ends when all capped.

Mission 3
Capture Forts on either side of Stronghold. You'll need some mortors/rockets or airstrikes. Forts have MG, bunkers, and anti-tank bunkers.
Mission ends when both forts cap points secure.

Mission 4
Counterattack. Enemy will push you back with airstrikes and reinforcements.
Mission ends after couple minutes.

Mission 5
Take Stronghold. You'll need everything to attack it.
Mission ends when cap points in stronghold secure. Keep note after this happens, enemy blows up the stronghold.

Mission 6
Push enemy back to base. watch for howies, railgun starts shooting random targets from enemy base. tanks and troops attacking.
Mission ends when cap points secure along enemy hq boarder.

MIssion 7
All zones open up. Enemy AI attacks. You'll want range weapons as enemy hq has many to defend its base.

Game ends when all 4 HQ are destroyed.