Russia has 800 MBT operative
Germany has around 200 (4 armored battalions) operative (2 armored brigades, all tracked)
France has around 200 (4 armored battalions) operative
UK has around 150 (3 armored battalions) operative
Italy has 150 (3 armored battalions) operative (1 armored brigade and 1 mech brigade, all tracked)
Spain has around 200 Leo2A6E operative
Swiss has around 380 operative (are a old variant of Leopard 2A4)
Greece alot
so the European Champions is Poland followed by the little Swiss and Greece.