Boris Gudenuf
Deity
As posted, US Army's late 19th century Cavalry was far more versatile than just about any other 'modern' cavalry, Ironically, the US Army was one of the few that had NO cavalry units upgrade to tanks: the Cavalry Branch absolutely refused to convert to tanks so most of the new tank commanders either transferred or had already transferred into the infantry, the original Branch that controlled tank units, or into the new Armored Branch.Unique Cavalry is actually going to be kinda awkward because like, are they "upgrading" into tanks and keeping their traits ? Are they becoming obsolete ?
Which could provide background for America to get a special Upgrade path for its Modern Age Cavalry:
Cavalry ("Yellowlegs")
Armored Cavalry
Air Cavalry
The Armored Cavalry Groups were composed of light tanks, armored cars, armored infantry and self-propelled light artillery, and were the reconnaissance, screening, pursuit units of 1943 - 44 (all the traditional 'cavalry' roles) and in addition, had a ferocious defensive capability when needed: On the northern flank of the Bulge in December 1944 a German infantry division attacked the 102nd Armored Cavalry Group: 7 infantry battalions against 2 battalion-sized cavalry squadrons - and after three days had to call off its attacks completely, because, as the division commander reported, there were no leaders left in any of his infantry regiments. The officers and senior NCOs had been leading the attacks and had all been shot down. Every vehicle in the armored cavalry units had .50 caliber machineguns mounted on them, and every M2 .50 caliber machinegun came with a tripod so it could be dismounted for defense. Over 150 .50 caliber machineguns had simply massacred the German attacking forces.
From the Armored Cavalry came the 1st Air Cavalry Division of Vietnam fame, and the air reconnaissance and attack units in the modern brigades. Again, the US Army pioneered many of the modern air assault techniques which are now being heavily modified again as a result of the lessons of the Ukraine and Middle East fighting, but it would not be out of place to give a nod to the originals in the Game.
In every case, from horse cavalry to air cavalry, the emphasis should be on versatility: the ability to attack, move, and/or defend better than anybody else's similar units. Armored Cavalry and Air Cavalry, in fact, should just about be the fastest ground units in the game.