The suicidal attack on an impregnable fortress named ""Ant Hill"" in the film (against an unseen German enemy) was inspired by and loosely based upon the six-month bloodbath in 1916 during he Battle of Verdun for Fort Douamont, a French stronghold eventually captured by the Germans.Commissioner Gordon arrived on the scene and commanded that Napier be taken alive.During the shoot-out firefight with police, Batman arrived and also pursued Napier.When Napier shot at Batman, the bullet ricocheted off Batman""s outfit and sliced through his face, causing him to topple over a railing.There are also glass cases of other petrified animals around the perimeter, and framed fish hanging on the walls.He only found the frozen base and abandoned structural remains of the Alkali Lake Industrial Complex (of the Department of Energy and Natural Resources).BackgroundThe Big Sleep(1946) is one of Raymond Chandler""s best hard-boiled detective mysteries transformed into afilm noir, private detective film classic.