Hey there! I really adore American Civil War reenactments.
What exactly are those?
It's an effort made by people to recreate the appearance of a particular battle or even within the war.
Is there a group they are in? 
They're part of a group known as Civil War reenactors, or living historians as some like to go by.
Do you have to be a direct decedent to join? 
No, not at all. It's done by anyone to simply respect those who have fallen and teach what it was about to others.
Is there an age limit?
I do not believe so, but I will say children will need to have parental consent and be able to respect the act.