Two large landmasses separated by a contiguous body of water and various islands. Both landmasses are similar in size, but have very unique advantages due to shape and terrain. I'm not sure whether there would be enough AI opponents, so I opted to add coordinates for both East and West Germany as well as a unified Germany to be safe.
(1450, 150) -> Sweden
(700, 50) -> Norway
(1900, 850) -> Poland
(675, 525) -> Denmark
(225, 925) -> Netherlands
(1000, 900) -> Germany
(675, 875) -> West Germany / FDR
(900, 1150) -> East Germany/ GDR