Two Cruisers (A Battlecruiser counts as a Cruiser, but you may not have two Battlecruisers)
Four Gunboats
Four Bombers
Mostly Unlimited Fighters*
Both sides will have the same number of ships (Exceptions made for small numbers of extras).
Battles will begin at the Vespucci Jump Hole in the Magellan system and move towards the losing party in the case a decisive battle.**
In Home Systems (Vespucci for the Hellfire Legion, Alaska for the LSF), two decisive battles are required for the Attacker to move forward.
*See 2 on the list.
**A decisive battle is where the victor wins with at least half of his fleet remaining. Three victories in a row also count as a decisive battle.