Russian Empire

Little bit of Poland, Romania and Japan, Finland (Austria and Germany)

Russian Empire:
https://sofifa.com/players?type=all&na%5B0%5D=208&na%5B1%5D=30&na%5B2%5D=49&na%5B3%5D=37&na%5B4%5D=28&na%5B5%5D=33&na%5B6%5D=20&na%5B7%5D=3&na%5B8%5D=5&na%5B9%5D=189&na%5B10%5D=165&na%5B11%5D=191&na%5B12%5D=187&na%5B13%5D=169&na%5B14%5D=6&na%5B15%5D=40&col=pt&sort=desc

Not included:
Poland, Ukraine,


Eastern Bloc:
https://sofifa.com/players?type=all&na%5B0%5D=21&na%5B1%5D=37&na%5B2%5D=39&na%5B3%5D=10&na%5B4%5D=1&na%5B5%5D=51&na%5B6%5D=8&na%5B7%5D=17&na%5B8%5D=23&na%5B9%5D=9&na%5B10%5D=4&na%5B11%5D=12&na%5B12%5D=43&na%5B13%5D=44&na%5B14%5D=15&na%5B15%5D=33&na%5B16%5D=19&na%5B17%5D=219&col=pt&sort=desc