original_query: Which naval forces were involved in the Baltic Sea Campaigns during World War II?
query: Which naval forces were involved in the Baltic Sea Campaigns during World War II?
answer: The main combatants were Germany and Finland, opposed by the Soviet Union.  Other navies involved included the Polish Navy, the Swedish Navy, and the navies of Estonia, Latvia, and Lithuania (which were later incorporated into the Soviet Baltic Fleet). The British Royal Navy also planned operations in the area.