 That move raised tensions with the Soviets, who responded that Germany was supposed to have consulted with the Soviet Union under Article III of the pact.After Germany in September 1940 entered the Tripartite Pact with Japan and Italy, Ribbentrop wrote to Stalin, inviting Molotov to Berlin for negotiations aimed to create a 'continental bloc' of Germany, Italy, Japan and the Soviet Union that would oppose Britain and the United States.Stalin sent Molotov to Berlin to negotiate the terms for the Soviet Union to join the Axis and potentially to enjoy the spoils of the pact.