[Mobhack]

The soviet T-60 (assuming you are talking vehicles, not planes!) has a decent 20mm cannon, and is an excellent support weapon for grunt bashing - I like a pair operating with each rifle company. They hide til the nasty nazi tankies are dealt with by the KVs or T-34s etc, then pop out from the wood or ridge they were hiding behind and run forward to biff the grunts up. The weapon does splash damage and the HE supply is reasonable. Naturally, as with the MMG teams, one selects targets that have other grunts in ajacent hexes if one can so those get to share the joy.

The German PzIIs are same, but with a very limited ammo supply. Better to use the ealy model PzIV with short 75 and a decent supply of HE for grunt bashing duties.

Italy has an armoured car with a 20mm autocannon (I think), and a light tank ditto - not had much experience with those other than on the receiving end as British, when they simply end up as kill markers for anything with a 37mm or 2 pdr.

None of these fare well in the face of enemy armour greater than little scout cars - and even those can off them e.g. the German one with a 2.8cm squeezebore will usually off a T-60 with ease and daimler armoured cars deal with PzII and the italian jobs.

And if the enemy has bought some ATG, unless you lucky then they will die quickly if exposed in the open. If lucky and the ATG miss then if you have cover to evede to or make smoke etc, then at least thay provide some intel for the arty to deal with the ATG nest.