I am Russian with Ucranian surname. And in Russian language a nickname for Ucraine is "Khokhliandia". So I can consider myself a real Hochlander.
For my Hochlandian army, I chose the following theme:
1. There's no cities, nor strategic trade roots going through Hochland. And the porovince is rather low-titled (only grand barony). So the country should be relatively poor and conservative.
2. There are much woods in the province.
3. Longrifle. There should be good gunpowder traditions.
Taking all that into mind, I made several ideas for the army:
1. There shouldn't be any pikes and crossbows, steam tanks, those toys of coddled people from southern cities.
2. There shouldn't be much knights. Woodsmen are normally freeholders, not serfs. I assumed that only two knightly orders are influental there: Reiksgard (they are whatchdogs of Emperor, and you can see them in any Emperial land) and Knights of the Silver Mountain, formed by local nobility.
3. The land is not rich and it is conservative. So, the rulers show modesty and do not keep many expencive troops. Greatswords, pistoliers, hellblaster, hellstorm, monsters are possible, but in big numbers. And characters there would more likely to go into battle on foot, or horseback, not war altar or monster.
4. The army is mostly infantry, and it's bulk consits of conservative weapons from wood: spears and halberds. Gunners are main shooting force. Bowmen, swordsmen, freecompanies are less widespread.
5. They are experts in guncrafting, so They have there own foundry in Hochland to make warmachines. But it is much smaller, than those in Nuln. So, it is very possible, that you see a one or two pieces of artillery in Hochlandian army. But t is VERY unlikely, that you'll meet three or more.