Step 1. Research on the American civil war.
Step 2. Look at some 2d/3d animation softwares that are free
Step 4. Make a small animation on what the civil war was (without all the gruesome stuff).
Step 5. Make a power point on the American civil war.
Step 6. Edit the animation (add sounds/voice actors).
Step 7. Present the amazingness.
Step 8. Feel great.