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October 20
ON THIS DAY

October 20

5 moments across history

1973

Sydney Opera House Opens

Sydney Opera House Opens

Sydney Opera House Opens

Sydney Opera House Opens — detail

Year: 1973

On October 20, 1973, Queen Elizabeth II formally opened the Sydney Opera House, the performing-arts complex designed by Danish architect Jørn Utzon. Its distinctive shell-like roofs made it an internationally recognized architectural landmark and an enduring symbol of Sydney and Australia. The opening followed years of construction, cost overruns, and controversy, including Utzon’s 1966 resignation before the building was completed.

1962

Sino-Indian War Begins

Sino-Indian War Begins

Sino-Indian War Begins

Sino-Indian War Begins — detail

Year: 1962

On October 20, 1962, Chinese forces launched coordinated offensives against Indian positions along disputed Himalayan frontiers in Ladakh and the North-East Frontier Agency. The war exposed India’s military weaknesses, resulted in Chinese control of Aksai Chin, and caused a lasting rupture in Sino-Indian relations. It arose from unresolved borders inherited from the colonial era, competing territorial claims, China’s consolidation of Tibet, and mounting tensions between Asia’s two largest states.

1947

Hollywood Communism Hearings Begin

Hollywood Communism Hearings Begin

Hollywood Communism Hearings Begin

Hollywood Communism Hearings Begin — detail

Year: 1947

On October 20, 1947, the House Un-American Activities Committee opened public hearings into alleged communist influence in Hollywood, questioning film-industry figures about their political affiliations. The hearings led to contempt-of-Congress citations against the “Hollywood Ten” and helped fuel an industry blacklist that denied work to many suspected communists and their associates. They became a defining episode of the early Cold War’s Second Red Scare, when fears of Soviet influence intensified investigations of alleged subversion across American society.

1944

Allied Forces Land on Leyte

Allied Forces Land on Leyte

Event 5

Allied Forces Land on Leyte — detail

Year: 1944

On October 20, 1944, U.S. forces landed on Leyte as General Douglas MacArthur returned to the Philippines alongside Philippine leaders. The invasion began the Allied campaign to liberate the archipelago from Japanese occupation and sever Japan’s access to vital resources. It formed part of the wider Allied advance across the Pacific and helped trigger the Battle of Leyte Gulf, a decisive defeat for Japan’s navy.