For the Napoleonic period, two books of interest cover life in the military at that time and living history: "The Napoleonic Soldier" by Stephen E. Maughan (1999) and "Marching with Sharpe" by B. J. Bluth (2001). Various Napoleonic reenactment groups cover the history of their associated regiments as well as try to describe and illustrate how they approach recreating the period. The goal to be as authentic as is possible has led many serious reenactment societies to set up their own research groups to verify their knowledge of the uniforms, drill and all aspects of the life that they strive to portray. In this way reenactment plays a vital role in bringing history to life, keeping history alive, and in expanding the knowledge and understanding of the period.