Rank and File are a set of horse and musket rules that cover the period from 1740 through to 1900. The basic game mechanics are designed to be simple and easy to learn with the aim of being able to play large games within a reasonable time frame.
While the game itself is easy to pick up there are extensive optional and advanced rules as well as period specific rules that allow the game to cater for all tastes as well as being flexible enough to cope with lots of game sizes, scales, figure availability and numbers of players.
While the basic D6 mechanics make Rank and File a 'fast play' system that doesn't mean that important areas of the rules are glossed over or omitted.