Here is the full list of all 20 Civil War: 1861 achievements.
Destroy 1 Union Artillery Gun.
Complete the tutorial.
Destroy 1 Confederate Artillery Gun.
Destroy 12 enemy units in a row without losing any of your own.
Destroy 8 enemy units in a row without losing any of your own.
Destroy 3 enemy units in a row without losing any of your own.
Destroy 5 Confederate Artillery Guns.
Destroy 10 Confederate Artillery Guns.
Destroy 5 Union Artillery Guns.
Destroy 10 Union Artillery Guns.
Complete 5 scenarios on Hard difficulty.
Complete 10 scenarios on Hard difficulty.
Complete 15 scenarios on Hard difficulty.
Complete 20 scenarios on Hard difficulty.
Complete the Opening Shots Campaign on Union Side.
Complete the Opening Shots Campaign on Confederate Side.
Complete the Conflagration Campaign on Union Side.
Complete the Conflagration Campaign on Confederate Side.
Complete the Total Resolve! Campaign on Union Side.
Complete the Total Resolve! Campaign on Confederate Side.