The Ludus Militis Roman Century Tactica Kit including the Printed manuals, CD Rom, and a Faux Tessarae tablet!  Perfect when you forget a drill command!

Tactical Drill Manual of the Imperial Roman Army 
A thoroughly researched version of the drill commands likely used by the Roman Army in the Pax Romana period and before.  The Tactica takes a number of sources (with footnotes and references... three pages of them!) to put together the most complete drill manual for Contubernium or Century movement.  This is the drill adopted and used for the annual AD43 Lafe Event by the US Legions attending.  Building on the commands used by many of our independent legions, the Tactica is the "next step" in Latin drill.

The Ludus Militis Tactica Kit