If u r ON the rebels the Empire will mostly have tartan patrol cruisers,missleship(forgot the name) and Acclamtors.

If u are on the Empire the enemy will mostly have X-wings,Y-wings,correllian corvette,coreelian gunships,A-wings,and sometimes the big ship thing (not the moncalamari cruiser the other long looking one)

And the Pirates will usually have their big ships,and alot of smaller ships,and even their medium ship(equivalent to the tartan patrolcruiser,or corellian corvette)