AOV Before the Leaves Fall, the Great War 1914 is an independent Age of Valor (AOV) expansion chapter or mini-module for Age of Eagles II, also known as Napoleonic Fire & Fury. It covers the Guns of August 1914 campaign of World War I, both Eastern and Western Fronts. As such AOE II is needed to properly play this game. In most cases all rules changes have been imbedded in the Data Charts as well as the charts and tables on the Quick Reference Sheet. All players need to do is use these new specifications or DRMs with the original rules, then play as normal. Any changes unique to the Guns of August period of the Great War, the subject of this expansion set, are included for both the conflict overall, and the included battles of Mons and Charleroi in the West, and Gumbinnen and Krasnik in the East scenarios. The AOV product line is sold primarily via a digital PDF distribution format, though a hardcopy version is available from certain retailers. It is 42 pages long. —description from the designer