Battle cruisers come next on the list of units. These are giant ships that are used primarily as carriers. Destroyers come third. There will also be support corvettes, escort shuttles and science vessels. The fourth group of units are commandos which are used to board and capture enemy ships.
Fighters are the final class of ships.
They operate in up to 12 squads each under the command of an individual leader. Each leader gains experience from combat and develops a unique set of skills. You will begin to see certain personalities develop in your leaders. It's up to you to put them to their best use. The orders system in O.R.B. is very well conceived.