There are many "Generals" out there in Aces High. But the only orders youll have to really follow are your own. Have fun. If someone asks for help and you feel like doing it, go ahead. If you feel like doing something else - go ahead
. There is NO "chain of command" whatsoever, every player has the same rights - always be respectful of others, have fun but do not hamper others fun.
Whats the larger objective.... thats a bit more complicated. Or not: Again: largest objective - HAVE FUN!
Some have fun taking the bases and winning The War (ie one country down to 3 fields, country with largest number of bases wins the reset). Some just have fun fighting each other, not really caring about a larger landgrabbing objective, simply flying for the competition. Some fly for their score/rank and enjoy racking up kills. Some enjoy hiding around "tanktown", hunting other ground vehicles, some have fun in doing 3 hour bombing missions. Some enjoy teamwork, some rather fly and fight alone.
In the Main arena, theres no real roleplay. The country you fly for will always be green. They are simply differentiated by the chess piece. If you want to put any allegiances and loyalties to a chess piece is again personal preference. Some do, some dont (and switch country regularly, like myself for example).
As for squads and what they do/dont: Check out the Squadron forum at the bottom of the forum list. Recruiting squads usually post there. You can also post and describe what you want in a squad and see who comes back at you.
EDIT: If youre looking for historical immersion and roleplay setups, AvA is the place to go. As well as SEA (Special events arena) where youll have Snapshots, Squad ops and Scenarios on historical maps with historical background and planesets. Check out the respective forums for more info.