It Was the War of the Trenches #0 (2010)

Heavily researched and meticulously drawn, this WWI graphic novel focuses on the day to day lives of the ordinary men in the trenches. Exceedingly factual and realistic, it is often based off of real-world accounts and stories. It is usually compared to Maus, but instead concerns WWI, is non-linear and utilizes an ever-changing human cast. He explores various issues relating to the war through his use of non-linear character vignettes.