Perhaps I should dwell a little bit on the reasons for my chronological categories. The main seperation is a military, based on cultural and social situation mainly in Europe at these times...

I would classify the time prior to 1500 as kind of late medieval or renaissance at best. The period from 1500 to 1650 sees the first wave of European expansion into the world, Russias expansion to the Pacific, the high tide of the Ottoman and Mogul empires, the culmination of the Japanese history into the Shogunate. Culturally it sees the transformation of a feudal society into national states and the strong decline of church influence. The wars waged are religious more often then not, ending with the European world at war, the treaty of Westphalen that is (or was) a cornerstone in international diplomacy and the end of the British civil war. Technically it saw the introduction of the gun, from Pavia to Nagashima into the battlefields of the 30 year war. Starting with Landsknechts and Tercios this periods ends with the armies and navies of national armies that form the nucleus of our modern times.

If strained for a name I would call this period the "Rise of the west", or the "Rise of Europe", as the creation of European empires is imho the most lasting impact.

The period from 1650 to around 1790 is imho the high tide of cabinet wars, conflicts waged between states and nations for reasons decided by cabinets and battled out in some kind of bloody formal dance by their armies and navies. I am not so sure on this date, however, for my next period would be the revolutionary period. For the Americans the war of independece belongs in the latter category, unlike the French/British war some score years earlier, while this war belongs clearly still to the cabinet wars for the French. The same goes to the first period of the revolutionary wars, with the campaign of 1792 being the one for the coalition, the other for the French. But there is imho a cultural distinction between Malplaquet or Leuthen versus Borodinow or Leipzig. The latter was waged by national levied armies, battling for their national survival rather then some kind of trained professionals.

Have to stop here, more later. I am not quite sure where to put the Napoleonic (or revolutionary) period, but I am sure it does not belong to the cabinet era. Used as revolutionary, it can be extended to the 1850ies to include the European revolution of 48, but I admit that this is rather arbitrary. The unity or civil wars of the 1860ies to 70ies clearly belong to another era and seem to have happened at least in China, Europe and Northern America, with another brutal interstate-war in Southern America. I would like to see these to differ from the imperialist and colonial wars of the following decades - starting with the Russio-Turkish war of 1878 and probably ending with the Balcan wars that preceed WWI.