Denmark, a much-forgotten NATO member, actually fielded their version of the
M41 Walker Bulldog right into the Twilight 2000 period.
Now, it's been covered in some source-books but the salient feature is that it was updated to mid-nineties grade while still keeping the venerable to impressive derivative of the late Second World War US M1 76mm cannon in its 76mm M32A1 form.
Now, this gun is absolutely perfect for Twilight 2000 and I don't use that lightly. The reason is that it's powerful but not too powerful. While powerful enough to see off anything below an MBT the M32A1 isn't so powerful that your players can tear a swathe right across Poland and Germany. If you come up against a T-62 or above you have to pull your head in and go around or become extremely creative in how you deal with it. This means a GM can give the players the effects of modern tank warfare but also have that moment where they look at the two T-80s nosing around the hill an decide that that direction is not worth investigating.
As the Danish M41, the M41DK, has only about 25mm of very well-sloped armour it can tussle with stuff that mounts KPVs but has to be an ambush predator for anything else. Thus the infantry players still have a role as they screen and protect the gun tank. They go in, clear out the RPG teams and look for mines/IEDs so the M41DK can get into position and then it does its job. This sort of combined arms warfare should be the meat and potatoes of T2K fighting.
For play I recommend one player be the TC and give the rest of the crew positions to NPCs. The TC controls the NPCs through his Leadership skill (or equivalent). Still, the GM should do the NPC's rolls or the TC suddenly gets a whole bunch of characters to play and that makes a power disparity for those players who elected to run a PBI out there in the mud. I recommend also a far larger diversity for crew personalities than the cards and training quality. I'd make entirely new characters and base them on someone. This makes the crews much more memorable and stops them being robots that one player controls.
(
https://en.wikipedia.org/wiki/M41_Walker_Bulldog)
