De Bellis Multitudinis (DBM) is probably the most played set of rules for the hobby of ancient and medieval wargaming today, for the period 3000 BC to 1485 AD. DBM is at the more strategic end of the tabletop figure gaming genre, as its name implies (De Bellis Multitudinis = The Wars of the Many) it is aimed primarily at simulating large battles. The rules allow armies to be chosen from published Army Lists (in 4 books, with about 250 different army lists in total - but many more once all the in-list variants are taken into account) using a points system to select roughly equal armies if required.