Britain and France Poland Estonia Romania Latvia Lithuania spheres of interest Russian Empire aftermath of World War I Kresy Belarus Soviet-Polish War Molotov–Ribbentrop Pact West France World War I Soviet Union German
In 1939 the Soviet Union considered forming an alliance with either Britain and France or with Germany. When negotiations with Britain and France failed, they turned to Germany and signed the Molotov–Ribbentrop Pact in August 1939. Germany was now freed from the risk of war with the Soviets, and was assured a supply of oil. This included a secret protocol whereby territories controlled by Poland, Finland, Estonia, Romania, Latvia and Lithuania were divided into spheres of interest of the parties. The Soviet Union sought to re-annex some of territories that were under control of those states, formerly acquired by the Russian Empire in the centuries prior and lost to Russia in the aftermath of World War I; that included land such as the Kresy (Western Belarus and Western Ukraine) region ceded to Poland after losing the Soviet-Polish War of 1919–1921.
