The main strategy of the Anglo-French is to bottle up the Poles and deny them access to the world's oceans. There is mention of a war in the 1940s (roughly equivalent to World War II, but of a much more limited extent) in which the Polish Navy was decisively beaten. Since then, an alliance with the Scandinavians at the exit from the Baltic and with the Roumelians (Byzantines) at the exit from the Black Sea denies passage to Polish warships—though they try to circumvent this blockade and build an ocean-going navy with the help of some African states.