The goal of this thesis is to do research , as wide as possible, in the most popular part of hobby named reenacting or reenacting (Napoleonic era, Austro-Prussian Wars, American Civil War, Second World War and some new topic - Czechoslovak Peoples Army, Royal Air Force and Czechoslovak Policemen before WW2). Thats mean commemoration and re-enactment of military history and military units in whole its history from time before 1989 to the future. I tried to find grounds of this hobby and describe development of it. As I expected, progress of this hobby or movement is larger, but this hobby existed before 1989 too. Reenactors reenacted and portrayed older conflicts as Napoleonic and Austro-Prussian war. Future reenactors were mainly fencers and tramps. Year 1989 was turning point for all reenactors. Theirs hobby is legal, it is possible to travel, to unite, to ground living history groups, own weapons, speak about all part of our history. It was possible to share and search information, regulation with and in foreign countries, foreigners and archives and museums. Main goal of reenactors is to portray theirs archetypes as good as possible. Public can see not only reconstruction of battles, but open air exhibition - "very interactive museums". This thesis can't be described as "Complete, all history of...