@AlfhedilGotcha. So because of the steampunky breaks in the year/tech line, I'm assuming most tanks, planes, and the like will be akin to those in WWI - wood and linen propeller aircraft, small Renault FT-types or rumbling, British Mark I-X types, etc.
There's a little bit of creative freedom there, in that so long as things are steam-powered and roughly with the setting, things should be good. I am, for instance, having my nation's military focus pretty exclusively on armored warfare and infantry combat, to the detriment of their navy and air-force. Functionality is what I will personally be looking at when it comes to people's military and technology.