WHAT ALL HAPPENED MAY TO JULY 1955
Find out what all happened May to July 1955

Disneyland is dedicated and opened by Walt Disney in Anaheim, California. (17. July 1955)

Eighty-three spectators are killed and at least 100 are injured after an Austin-Healey and a Mercedes-Benz collide at the 24 Hours of Le Mans, the deadliest ever accident in motorsports. (11. June 1955)

The Russell–Einstein Manifesto is released by Bertrand Russell in London, England, United Kingdom. (9. July 1955)

Lux Radio Theater signed off the air permanently. The show launched in New York in 1934, and featured radio adaptations of Broadway shows and popular films. (7. June 1955)

Cold War: Eight Communist bloc countries, including the Soviet Union, sign a mutual defense treaty called the Warsaw Pact. (14. May 1955)

First ascent of Kangchenjunga (8,586 m.), the third-highest mountain in the world, by a British expedition led by Charles Evans. Joe Brown and George Band reached the summit on May 25, followed by Norman Hardie and Tony Streather the next day. (25. May 1955)

The South African Congress Alliance adopts the Freedom Charter at the Congress of the People in Kliptown. (26. June 1955)

Cold War: West Germany joins NATO. (9. May 1955)

Nineteen days after bus workers went on strike in Singapore, rioting breaks out and seriously impacts Singapore's bid for independence. (12. May 1955)

Tennessee Williams wins the Pulitzer Prize for Drama for Cat on a Hot Tin Roof. (2. May 1955)

Mir Mine, the first diamond mine in the USSR, is discovered. (13. June 1955)

West Germany gains full sovereignty. (5. May 1955)

The USSR and Yugoslavia sign the Belgrade declaration and thus normalize relations between both countries, discontinued since 1948. (2. June 1955)

Eighteen Nobel laureates sign the Mainau Declaration against nuclear weapons, later co-signed by thirty-four others. (15. July 1955)

In the United States, a night-time F5 tornado strikes the small city of Udall, Kansas, killing 80 and injuring 273. It is the deadliest tornado to ever occur in the state and the 23rd deadliest in the U.S. (25. May 1955)

Chile becomes a signatory to the Buenos Aires copyright treaty. (14. June 1955)

Operation Passage to Freedom, the evacuation of 310,000 Vietnamese civilians, soldiers and non-Vietnamese members of the French Army from communist North Vietnam to South Vietnam following the end of the First Indochina War, ends. (18. May 1955)

The Union Mundial pro Interlingua is founded at the first Interlingua congress in Tours, France. (28. July 1955)

In a futile effort to topple President Juan Perón, rogue aircraft pilots of the Argentine Navy drop several bombs upon an unarmed crowd demonstrating in favor of Perón in Buenos Aires, killing 364 and injuring at least 800. At the same time on the ground, some forces soldiers attempt to stage a coup but are suppressed by loyal forces. (16. June 1955)

Austria regains its independence as the Allied occupation following World War II ends. (12. May 1955)