On the 23rd July 1914, Austria-Hungary issued an ultimatum to Serbia specifically designed to be rejected and lead to war between the two countries.

Attended by the “Big Three” Allied leaders, the conference saw United States President Franklin D. Roosevelt, British Prime Minister Winston Churchill and Soviet Premier Joseph Stalin meet to discuss the government of post-war Europe.

Roosevelt announced the establishment of formal diplomatic relations with the USSR on 16 November, and appointed William C. Bullitt as the first Ambassador to the Soviet Union.

On the 17th September 1978 the Camp David Accords, which led to the first ever peace treaty between Israel and an Arab state, were signed by Egyptian President Anwar El Sadat and Israeli Prime Minister Menachem Begin.

Henry Kissinger, Richard Nixon’s National Security Advisor, made a secret trip to China to meet with Premier Zhou Enlai.

The United States table tennis team heralded the era of ‘ping pong diplomacy’ by becoming the first official American delegation to visit China in 20 years.

France and the United States signed the first two treaties ever negotiated by the American government, and which formally recognised the independence of the United States.

Germany and Russia signed the secret Reinsurance Treaty that ensured they would each remain neutral if the other went to war with a third European power.