Japan urged Germany on December 2, 1941, just two days after informing Berlin of its intention to go to war, to join the war with the United States. Japan did not receive a response and turned to Italy. On the morning of December 5, at 4 a.m., Ribbentrop presented the Japanese ambassador with a proposal approved by Italy to join the war and follow it together. On December 11, 1941, the same day as the German declaration of war against the United States and the Italian declaration, the three powers signed an agreement that was concluded on December 8, which excludes any separate peace with the United States or Great Britain. It is a “propaganda accompaniment for the declaration of war.”  ARTICLE II. Italy, Germany and Japan each commit to suring that none of the parties to this agreement be concluded without a ceasefire or peacefully, either with the United States or with England without a full and reciprocal agreement [of the three signatories to this pact]. The tripartite pact, also known from the Berlin Pact, was an agreement between Germany, Italy and Japan, signed on 27 September 1940 in Berlin by Joachim von Ribbentrop, Galeazzo Ciano and Saburé Kurusu. It was a military defence alliance, followed by Hungary (20 November 1940), Romania (23 November 1940), Bulgaria (1 March 1941) and Yugoslavia (25 March 1941) and the German clientelistic state of Slovakia (24 November 1940). Two days later, Yugoslavia`s accession provoked a coup d`état in Belgrade.
Germany, Italy and Hungary responded by invading Yugoslavia. The resulting Italian-German clientelistic state, known as the independent state of Croatia, joined the Covenant on 15 June 1941. When they received the Soviet proposal in November, they simply did not respond. However, they accepted the new economic offers and signed an agreement for them on January 10, 1941.  ARTICLE 5. Japan, Germany and Italy argue that the previous agreement does not affect the current political status between each of the three contracting powers and Soviet Russia. On January 18, 1942, the German and Italian governments signed two secret enterprise agreements: one with the Imperial Japanese Army and the other with the Imperial Japanese Navy. The agreements divided the world along the 70-degree length to the east into two major areas of intervention, but they had almost no military significance. Above all, it is committed to cooperation in the areas of trade, intelligence and communication.  The tripartite pact was the culmination of a series of agreements between Germany, Japan and Italy. On 25 October 1936, Germany and Italy concluded the Rome-Berlin axis, a cooperation agreement.