You're an anti-invasion specialist sent ahead of the main fleet to battle on-coming Sculari forces who are invading his home system.
Watch out each ship has different abilities:
Cruisers have anti-physical damage abilities (they won't be harmed by missiles)
Battleships are big, strong, and fire a lot of pain your way.
Motherships are bigger, stronger, and fire WAY more pain your way.
Good Luck Captain.