Russkies will have to go through Poland, first, the Poles may not have the biggest army, but you can bet they’ll fight the Russkies with everything they’ve got.
Hopefully the Poles got more than broomsticks. Otherwise they would be just an inconvenient speed bump for the Russian army.
Polish Army (Wiki) - 120,000 active, 515,000 reserves
military budget - 1.95% of GDP
Main Battle Tanks: 1,000 (everything from T-72’s to Leopard 2A5’s)
AFV’s - 2,000 (everything from BRDM-2’s, humvee’s and KTO Rosomaks)
artillery- 1,200
army helicopters - 200 (mostly transport, utility helicopters)
-— almost no real navy to speak of)
112 air force fighters - 32 MiG-29A/UB, 48 F-16 C/D Block 52+, 32 Su-22M-4K/UM3K
.....................
Germany
active - 180,000, reserves - 144,000 (!!!)
budget - 1.2% of GDP
Their Wiki page doesn’t seem to number the tanks and fighters, that would need more digging I guess