i want to particiate in a civil war reenactment
It is really cool, American Civil War reenactment is an effort to recreate the appearance of a particular battle
what are some of the biggest ones?
Well I have heard that Although most common in the United States, there are also American Civil War reenactors in Canada
thats interesting
. 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
American Civil War reenactment
American Civil War reenactment is an effort to recreate the appearance of a particular battle or other event associated with the American Civil War by hobbyists known (in the United States) as Civil War reenactors, or living historians.
Although most common in the United States, there are also American Civil War reenactors in Canada, the United Kingdom, Germany, Australia, Italy, Denmark, Sweden, and Poland.
History.
Reenacting the American Civil War began even before the real fighting had ended