The Warsaw Treaty on Friendship, Cooperation and Mutual Assistance is signed (Warsaw Treaty Organization) (effective June 6).
The First Taiwan Strait Crisis comes to an end, as the People's Liberation Army of China temporarily ceases shelling Kinmen and Matsu.
The 1955 Grand Prix motorcycle racing season opens with the Spanish motorcycle Grand Prix, with Luigi Taveri winning the 125cc event and Reg Armstrong winning the 500cc.
In the UK, the Delph Donkey passenger train service is withdrawn from stations between Oldham and Delph.
Born: David Hookes, Australian cricketer, in Mile End, Adelaide (died 2004)
Died: George Enescu, 73, Romanian composer
West Germany becomes a sovereign country recognized by important Western foreign countries, such as France, the United Kingdom, Canada, and the United States.
The Western European Union charter comes into effect.
The Burmese ship SS Pyidawtha runs aground and is wrecked in the Bay of Bengal, off Cheduba Island.
Born: Mayra Alejandra, Venezuelan actress, in Caracas (died 2014)
Born: Meles Zenawi, Prime Minister of Ethiopia, in Adwa (died 2012)
West Germany joins the North Atlantic Treaty Organization (NATO).
United States Air Force 8th Tactical Fighter Wing pilot James E. McInerny. Jr. shoots down a MiG-15 (NATO reporting name "Fagot") fighter flown by a People's Republic of China pilot over Korea. It is the last MiG-15 shot down by United Nations forces in Korea.
Died:
Tommy Burns, 73, Canadian boxer
John Radecki, 89, Polish-born Australian stained-glass artist
Japanese National Railways' ferry Shiun Maru sinks after collision with sister ship Uko Maru in thick fog off Takamatsu, Shikoku, in the Seto Inland Sea of Japan; 166 passengers (many children) and two crew are killed. This event is influential in plans to construct the Akashi Kaikyō Bridge (built 1986-98).
Died: Gilbert Jessop, 80, English cricketer
New York's Third Avenue Elevated runs its last train between Chathem Square in Manhattan and East 149th Street in the Bronx, thus ending elevated train service in Manhattan.
Local elections are held in the UK cities of Leeds and Liverpool.
A riot takes place at an Elvis Presley concert in Jacksonville, Florida, USA.
Eight Communist Bloc countries, including the Soviet Union, sign a mutual defence treaty in Warsaw, Poland, that is called the Warsaw Pact. It will be dissolved in 1991.
Born:
Jonathan Robert De Mallie, Historian, Philanthropist, Investment Banker;
Died:
Charles Pelot Summerall, 88, US general;
Anwar Wagdi, 50, Egyptian actor and filmmaker (polycystic kidney disease)
The Austrian State Treaty, which restores Austria's national sovereignty, is concluded between the four occupying powers following World War II (the United Kingdom, the United States, the Soviet Union, and France) and Austria, setting it up as a neutral country.
Lufthansa begins its international service, with flights between West Germany and London, Paris, and Madrid.
Born:Enrique "El CAPO" Rosa, Dispatcher, Corona Drinker, in Puerto Rico;
Died: James Agee, 45, US writer (heart attack)
The Clark Art Institute opens to the public in Williamstown, Massachusetts, USA.
Dutch coaster Urmajo runs aground on the Goodwin Sands, Kent, United Kingdom. All ten crew are rescued by the Ramsgate lifeboat. They would later be returned to the ship which refloated on the next tide. Urmajo was towed into Ramsgate by the tug Ocean Cock.
Died: Mary McLeod Bethune, 79, US educator
The Black Sash women's movement is founded in South Africa by Jean Sinclair, Ruth Foley, Elizabeth McLaren, Tertia Pybus, Jean Bosazza, and Helen Newton-Thompson.
Born: Zbigniew Preisner, Polish film score composer, in Bielsko-Biała
The final of the DFB-Pokal football tournament is held between Karlsruher SC and Schalke 04, with Karlsruher winning 3–2.
Born: Chalmers "Spanky" Alford, US jazz guitarist, in Philadelphia, Pennsylvania (died 2008)
Future Archbishop James Scanlan becomes Roman Catholic Bishop of Motherwell, Scotland.
The French Open tennis tournament opens at Stade Roland-Garros in Paris.
Joe Brown and George Band are the first to attain the summit of Kangchenjunga in the Himalayas, as part of a British team led by Charles Evans.
Died: Alberto Ascari, 36, Italian race-car driver (racing accident)
The official Flag of Minneapolis is adopted.
A state election is held in Victoria, Australia. John Cain's Labor government is defeated by the Liberal and Country Party, led by Henry Bolte.
The Associated Society of Locomotive Engineers and Firemen in UK calls a strike which continues until June 14, leading to a State of emergency being declared on May 31.
The Norfolk and Western Railway in the United States begins its conversion to diesel locomotive power from a purely steam locomotive roster with the purchase of eight ALCO RS-3s.
Born: Mike Porcaro, US bass guitarist, in South Windsor, Connecticut (died 2015)
The UK minesweeper HMS Northumbria of the Royal Naval Volunteer Reserve is in collision with Cypriot ship MV Cyprian Prince off Newcastle upon Tyne and iss holed. Cyprian Prince tows her into Newcastle upon Tyne.
The UK collier ship Harfry collides with another British ship, MV Firmity, off Great Yarmouth, Norfolk. Both ships are holed. Harfry is beached at Hemsby and Firmity puts into Great Yarmouth.
Died: Bill Vukovich, 36, US race-car driver, killed in a chain-reaction crash while holding a 17-second lead on the 57th lap of the 1955 Indianapolis 500.
As tensions in the Formosa Strait ease, the People's Republic of China releases four captured American fliers. It will release all other captured Americans over the summer.
