I like watching civil war reenactments. Hobbyists  recreate certain battles
I have never seen one in person, but it always seemed odd to me, what is the reason?
Civil war veterans recreated battles as a way to remember their fallen comrades and teach what the war was about
That makes sense I suppose, I would rather just forget about the wars is all, but I do play war games all the time so i guess that is irrelevant
They do it all over, not just here. Canada, Italy, Sweden, Germany and other countries
Do they all have their own civil wars or do they reenact other ones?
the 125th Anniversary reenactment near the original Manassas battlefield, which was attended by more than 6,000 reenactors. That year, "Time" magazine estimated there were more than 50,000 reenactors in the U.S.
In 1998, the 135th anniversary re-enactment of the Battle of Gettysburg took place near the original battlefield. There have been several estimates on the number of participants, but it is widely agreed that it was the largest re-enactment ever held anywhere in the world, with between 15,000 and 20,000 re-enactors participating. This
. Civil War veterans recreated battles as a way to remember their fallen comrades and to teach others what the war was all about. The Great Reunion of 1913, celebrating the 50th anniversary of the Battle of Gettysburg, was attended by more than 50,000 Union and Confederate veterans, and included reenactments of elements of the battle, including Pickett's Charge. 
Modern reenacting is thought to have begun during the 1961–1965 Civil War Centennial commemorations. Reenacting grew in popularity during the 1980s and 1990s, due in large part to the success of