Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Against The Odds	Destroy three enemy ships in a battle involving only one ship of your own.
Blockade Boss	Destroy 40 enemy blockade runners.
Capture The Flag	Capture 20 enemy ports.
Frigate Fracas	Destroy 40 enemy frigates.
Gunboat Graveyard	Destroy 40 enemy gunboats.
Ironclad Incinerator	Destroy 40 enemy ironclads.
Ram Raider	Destroy 40 enemy rams.
Rise Of The South	Complete the Confederate campaign.
Shipwrecker	Destroy 750 enemy ships.
Sloop Slayer	Destroy 40 enemy sloops.
State Of The Union	Complete the Union campaign.
Steamer Stomper	Destroy 40 enemy steamers.