In addition, for the Germans I would also recommend checking out Gudmundsson's "Stormtroop Tactics, Innovation in the German Army, 1914-1918" (first printing 1989, reprinted by Praeger Publishers 1995. It is often cited as one of the best studies of the subject). Gudmundsson notes how the Germans changed the structure over the years, particularly from 1916 on (for example, the first allotment of the MG08/15 "light" machine gun in 1916 was 2 per infantry company, increased to 3, and then 4.; by the end of 1918 some companies on the Western Front had 6, while some companies on the Eastern Front never had more than 2). And beware of using Stormtroop Btn. Table of Organization and Equipment (TO&E) as representative of regular Infantry Btns. The "Establishment" Stormtroop Btns were fairly rare (typically one per Army) and very generously equipped (for example, they had permanently assigned flamethrower detachments). There is a lot of variation; the regimental history of the Bavarian Life Guard Regiment in 1918 gives two different TO&Es for two companies (and that's in the same regiment!)