As well, the problem of prerequisites extends to the playing of printed scenarios, many of which require components from multiple modules, particularly those scenarios released by third-party publishers. For instance, the Order of Battle (OOB) from a module may be needed to play one module while a single map board from the same module may be required to play a particular scenario. The Hollow Legions (HL) Module was originally intended to add on to West of Alamein (WOA) and as such the OOB from For King and Country will not be enough to play all scenarios in HL as the WOA map boards are required as well. Furthermore, an MMP Action Pack is required for one module, a Historical Study.