The second map White shows us is Warfare. The map seems to indicate only four fighting styles, although I'm sure warfare is composed in many more ways. However, it seems certain types of battle hold more sway in certain regions.
At first glance, one is tempted to just correspond armies with government types. For the most part it can looks that way, but it's bit more complicated than that.
The Horse Archers are the only section that was completed. Prominent in the West, with the vast expanses of grassland and desert, which in previous eras houses everything from Magyars to Huns. (And in fact, Horse Archers were prominent in much of the Old West) Although this form of warfare occupies the most area, there are probably relatively little combatants. One thing that I've been wondering about is how it seems to be the primary form of warfare throughout the desert kingdoms of Los Angeles and New Mexico. Are they the actual armies of the desert kingdoms, or do these municipalities simply have "generic soldiers", holding the fort against the nomads of the desert?
In yellow, we see an icon with a line of men holding polearms. The page is labeled "Pikemen". Pikes and spears were very popular in republics and early democracies like Rome, Medieval Italy and Greece. This form of weaponry could be especially useful with a large, relatively untrained force. Horses are very expensive to procure and maintain, and training is intensive. With a large population with often much better things to do, the popular tactic is to have a quickly rotating but compulsory enlistment, train them in a simple war maneuver, and move on. Plus, the republics of the North coasts really aren't all that interested in warfare when they don't have to--thus most of the fighting is primarily defensive. (Any hopes to expand are done on ships, not inland) Interesting, New Jersey is a feudal kingdom, but also uses pikes. This probably makes a large amount of sense--it's the primary weapon in the region, and hey, when in Rome. We also see a corridor down the Appalachian mountains. My best guess is that the principles are the same as the Flemings of Medieval Scotland. Scotland has influenced a lot of Appalachian folklore, so it probably makes sense it'd revert back to that. It's very likely this is the form of combat used most in tandem with the navy. A small group of pikemen must be very easy to transport.
The green patch with the shield signifies "lancers', which reading elsewhere, are melee combatants with heavily armored horses. In short, knights. White even has an image on what they would look like. Training takes up all of their life, since their main purpose in life is maintaining governments via conquest. There are also knights seen the Hydraulic Empires. Warriors here are also trained from birth to fight, and have no other purpose in life to serve their lord. In both cases, it seems the life of a lancer is one that is specifically meant to revolve specializing in combat. Interestingly, the knights of Deseret are also celibate, so that would make them very comparable to the Knights Templar, or possibly paladins of role playing games. I wouldn't be surprised to see that specific branch called something like Templars (Mormon worship is conducted in temples) or Crusaders. (The lancers seen in California are also supposed to be celibate, but I have a theory the fluctuating politics and richer forests of that region makes more "in theory". The dynastic turnovers White mentions are probably more common there.) However, there's also lancers in the area that occupies the New United States, particularly the area that occupies to Chesapeake Bay. For now, I'm drawing a blank on why it's there. In the East, lancers probably have their arms made from iron and steel, while in the west it's primarily bronze. For the first few centuries, many automobiles were scavenged and melted down to make weapons with. This has often made things like Mercury, sables and thunderbirds part of the heraldry.
There are many white spots on the map. Perhaps no war is waged at all, but I have to say I do have doubts about that. There is likely still a population that clings to the upper north, and the harsh winters have made them mean. Also, the Great Lakes region provides a quick and easy transport from the areas that probably cannot provide a lot, to those...that can. Thus, I would bet Minnesota and Northwest Ontario are home to Raiders, who routinely plunder the kingdoms to the south, and return home. Those of a kinder disposition might be tempted to trade metals and furs, but for the most part we see a powerful group of Raiders, with clubs and axes that do quick sacks and runs. The Lakes are somewhat easier to navigate, but also provide less buoyancy, so the raids are designed for frequency.
Florida also seems to have little military,even though Secretarial States were formed out of practical military matters, so there would have to be some kind of warrior class. My belief is, like the Horse Archers their combat come heavily from their way of life, and like Pikemen, their weapons are lightweight and no heavy on resources. Therefore, I think many of what they use is also good for the jungle. Bolo whips, poison-tipped darts and scimitars for cutting through heavy brush. Also, it's pretty certain that just like centuries ago, these islands became dens of piracy. I also have a theory that the reduced population might have to do with many zoo and circus animals making themselves at home. If the residents played their cards right, they might be able to have something akin to war elephants seen in India...at the very least I can see that tactic forming in Latin America.
Finally, while open warfare is not conducted in these regions, I think there is an occasional bout of espionage. this is especially true in the Cascades. These regions are probably occupied by rangers or certain kinds of spies.