Lists of the forces involved in various campaigns. Some with numbers.
Maps of various campaigns, and sources for topographical maps
What was fielded by the various armies in practice (official tables were so ignored in practice to be useless, and are not included).
Words you might meet when reading about the Pygmy Wars, including abbreviations and translations of terms from Russian.
Photos from my time traveling around Poland and Latvia, where I made sure to visit key battle sites.