Voice of the Guns is a set of free wargames rules for European land warfare from the 1850s to the Great War.
The author writes:
Voice of the Guns is a wargames system for European Land Warfare for the period from 1850, when the muzzle-loading rifle became widely adopted, to 1916, when the tank made its appearance on the European battlefield. In that time the cavalry lost its pre-eminence on the battlefield, the artillery developed the art of indirect fire thanks to the introduction of the recoil mechanism, and the machine-gun evolved into a weapon to fear.
The period runs from the Crimean War, up through the wars of Italian Unification, the Austro-Prussian and Franco Prussian Wars, the Russo-Turkish War and on to the early days of the First World War. The system may also be successfully used to refight the American Civil War and the Russo-Japanese War of 1904 The system is intended for large-scale actions up to corps and army level. The basic manoeuvre units are the infantry battalion, the cavalry squadron and the artillery
battery. With the possible exception of independent machine-gun companies, further subdivision of forces is not considered.
The system may be used for any scale of figures from 5-6 mm through 10-12 mm and 15 mm up to 25-28 mm and is not dependent upon specific numbers of figures per unit.