you might want to consider Ace Online.
This is space Age planetary and interplanetary jet interceptor combat.
One thing with this game - the BOSS enemy ships are INCREDIBLE. Never seen anything like them. out of this world truly alien creations.
Very hectic fighter combat. I don't play it because for me aerial combat is kind of boring now, there are actually only a few solutions to any pvp in aerial combat.
But.. Ace Online doesn't let you parachute out of you aircraft to land and capture a jeep. But it does have ground attack.
Be warned - I am a major player of Regnum Online the mmo. I've been playing it for about 2 years and rarely go without logging in at least once a day. You can also look at good alternatives to Regnum such ase Aion online and Aika Online.