Diplomatic Correspondence and Secret Agreements of the World Wars Era, 1914 to 1945

The pact was signed in Moscow on 24 August 1939 (backdated 23 August 1939) by Soviet Premier and Foreign Minister Vyacheslav Molotov and German Foreign Minister Joachim von Ribbentrop.

The Sykes-Picot Agreement () was a 1916 secret treaty between the United Kingdom and France, with assent from Russia and Italy, to define their mutually agreed spheres of influence and control in an eventual partition of the Ottoman Empire.

The Zimmermann telegram (or Zimmermann note or Zimmermann cable) was a secret diplomatic communication issued from the German Foreign Office on January 17, 1917, that proposed a military contract between the German Empire and Mexico if the United States entered World War I against Germany.

The Yalta Conference (Russian: Ялтинская конференция, romanized: Yaltinskaya konferentsiya), held 4-11 February 1945, was the World War II meeting of the heads of government of the United States, the United Kingdom, and the Soviet Union to discuss the postwar reorganization of Germany and Europe.

The Treaty of London (Italian: Trattato di Londra; Russian: Лондонский договор, romanized: Londonskiy dogovor) or the Pact of London (Patto di Londra, French: Pacte de Londres) was a secret agreement concluded on 26 April 1915 by the United Kingdom, France, and Russia on the one part, and Italy on the other, in order to entice the latter to enter the Great War on the side of the Triple Entente.

The Constantinople Agreement (also known as the Straits Agreement) resulted from a secret exchange of diplomatic correspondence between members of the Triple Entente from 4 March to 10 April 1915 during World War I.

The Twenty-One Demands was a set of demands made during the First World War by the Empire of Japan under Prime Minister Ōkuma Shigenobu to the government of the Republic of China on 18 January 1915.

The Lansing-Ishii Agreement (石井・ランシング協定, Ishii-Ranshingu Kyōtei) was a diplomatic note signed in Washington between the United States and Imperial Japan on 2 November 1917 over their disputes with regard to China.

The Hossbach Memorandum (or Hossbach Protocol) records minutes of a meeting in Berlin on 5 November 1937 attended by German dictator Adolf Hitler and his military and foreign policy leadership in which Hitler outlined his expansionist policies.

The Zinoviev letter was a forged document published and sensationalised by the Daily Mail newspaper four days before the 1924 United Kingdom general election, which was held on 29 October.

The correspondence is composed of ten letters that were exchanged from July 1915 to March 1916 between Hussein bin Ali, Sharif of Mecca and Lieutenant Colonel Sir Henry McMahon, British High Commissioner to Egypt.

David Ben-Gurion, then head of the executive committee of the Jewish Agency, wrote a letter to his son Amos on 5 October 1937.