Britain signs a treaty with the United States in Paris, formally ending the American Revolutionary War and recognizing American independence.
The United States buys the vast Louisiana territory from France, roughly doubling the size of the country.
The treaty ends the Mexican–American War, with Mexico ceding California and much of today's Southwest to the United States.
The United States signs a treaty to buy Alaska from the Russian Empire for $7.2 million.
The peace treaty ending the war between Germany and the Allies is signed in the Hall of Mirrors, imposing war guilt, territorial losses and heavy reparations on Germany.
Roosevelt, Churchill and Stalin meet at Yalta to discuss the post-war reorganisation of Europe and the world.
Japan signs the Instrument of Surrender aboard USS Missouri in Tokyo Bay, formally ending the Second World War.
The UN Charter enters into force after ratification by a majority of signatories.
Under the Treaty of Manila, the United States recognises the independence of the Republic of the Philippines.
Twelve North American and Western European countries sign the North Atlantic Treaty in Washington, creating the NATO collective defence alliance.
Japan signs a peace treaty with the Allied powers, ending the occupation when it takes effect in 1952.
The United States, North and South Vietnam and the Provisional Revolutionary Government sign an agreement ending direct US involvement in the war.
Egyptian President Anwar Sadat and Israeli Prime Minister Menachem Begin sign US-brokered accords, leading to the 1979 Egypt–Israel peace treaty.
Israel and the Palestine Liberation Organization recognise each other and sign the Declaration of Principles in Washington, creating the Palestinian Authority.
The North American Free Trade Agreement between the United States, Canada and Mexico takes effect, creating one of the world's largest trade blocs.
President Bill Clinton announces the normalisation of diplomatic relations with Vietnam.
A peace agreement negotiated in Dayton, United States, is formally signed in Paris, ending the Bosnian War.
Israel signs US-brokered agreements normalising relations with the United Arab Emirates and Bahrain.