{"record":{"aliases":["Harold Anthony Caccia","Baron Caccia"],"appointmentIds":["united-kingdom-dc5371c7b532c5"],"appointmentsDataset":"https://chanceries.org/diplomats.json","archivalSources":["src-56127356c54a254c"],"canonicalUrl":"https://chanceries.org/diplopedia/people/sir-harold-caccia-98d98c1b57/","countrySlug":"united-kingdom","entityId":"https://chanceries.org/diplopedia/people/sir-harold-caccia-98d98c1b57/#person","eventIds":[],"expandedParagraphs":["Harold Caccia was born in India in 1905 and educated at Eton and Trinity College, Oxford. He entered the Foreign Office in 1929, served in Beijing, and worked in Anthony Eden’s private office before posting to Athens. During the war he worked with Harold Macmillan in North Africa, the Allied Control Commission in Italy, and British forces in Greece. Afterward he helped implement administrative reforms in the Foreign Office and represented Britain in occupied Austria.","As ambassador in Washington from 1956 to 1961, Caccia took part in the renewed Anglo-American nuclear relationship. He joined the British delegation at Macmillan’s June 1958 talks on amendments to the American Atomic Energy Act and advance consultations between experts.","Caccia also worked with David Ormsby-Gore on nuclear test negotiations. In an October 1959 meeting, American officials questioned whether a voluntary halt to underground tests would concede too much without adequate verification. Caccia suggested that the United States could refrain from testing in practice without making a formal declaration.","Returning to London, Caccia became permanent under-secretary in 1962 and head of the Diplomatic Service in 1964. He retired in 1965 and served as provost of Eton until 1977. His later activities included business directorships, public records work, the Order of St John, and crossbench participation in the House of Lords."],"id":"united-kingdom:sir harold caccia","identifiers":{},"legacyPersonIds":[],"legacyUrl":"https://chanceries.org/diplomat-98d98c1b57fa126a8d72.html","name":"Sir Harold Caccia","notes":[],"paragraphSources":[["src-56127356c54a254c"],["src-54ff8c14e2f808e4"],["src-49bf9c6a804171c2"],["src-56127356c54a254c"]],"profileUrl":"diplomat-98d98c1b57fa126a8d72.html","relatedEvents":[{"basis":"reviewed-context","country":"United Kingdom","date":"1956-10-31","description":"Dwight Eisenhower publicly opposes the British, French, and Israeli attack on Egypt. American pressure helps force a ceasefire, bringing a severe rupture within the Western alliance.","id":"uk-suez","note":"Makins handled the pre-invasion dispute and left in October; Caccia served during the subsequent repair of relations. Alphand and Eban represent the French and Israeli sides described.","sourceUrls":["https://www.presidency.ucsb.edu/documents/radio-and-television-report-the-american-people-the-developments-eastern-europe-and-the","https://history.state.gov/milestones/1953-1960/suez"],"title":"Washington opposes the Suez invasion","url":"United-Kingdom.html#history-uk-suez"},{"basis":"reviewed-context","country":"Israel","date":"1956–1957","description":"The United States opposes the Israeli, British, and French attack on Egypt. American pressure for a ceasefire and withdrawal exposes a serious difference between Washington and Israel.","id":"israel-suez-1956","note":"Eban is named in the withdrawal negotiations. Makins handled the lead-up; Caccia and Alphand represent the British and French sides during the subsequent crisis.","sourceUrls":["https://history.state.gov/milestones/1953-1960/suez","https://history.state.gov/historicaldocuments/frus1955-57v17/d187"],"title":"Washington opposes the Suez invasion","url":"Israel.html#history-israel-suez-1956"}],"relatedPeople":[],"relationships":[],"researchStatus":"reviewed","reviewedOn":"2026-10-28","revision":"b118f7c406827002","sources":[{"accessedOn":"2026-10-28","date":null,"id":"src-56127356c54a254c","locator":"MS67105, administrative and biographical history","publisher":"Eton College Collections","title":"Papers of Harold Anthony Caccia, Baron Caccia","type":"archive","url":"https://catalogue.etoncollege.com/ms-671-05"},{"accessedOn":"2026-10-28","date":"1958-06-09","id":"src-54ff8c14e2f808e4","locator":"FRUS1958–1960 VII part2, document347","publisher":"US Department of State, Office of the Historian","title":"Memorandum of conversation: US–UK agreement on nuclear weapons","type":"primary-record","url":"https://history.state.gov/historicaldocuments/frus1958-60v07p2/d347"},{"accessedOn":"2026-10-28","date":"1959-10-20","id":"src-49bf9c6a804171c2","locator":"FRUS1958–1960 III microfiche supplement, document502","publisher":"US Department of State, Office of the Historian","title":"Memorandum of conversation: Geneva nuclear test negotiations","type":"primary-record","url":"https://history.state.gov/historicaldocuments/frus1958-60v03mSupp/d502"},{"accessedOn":"","date":"1961-05-02","id":"mission-4680d2f8d3c6997c7552","locator":"Argued Britain’s position on European integration and its EFTA obligations in May 1961 talks with U.S. officials.","publisher":"","title":"FRUS: European economic integration talks","type":"Mission record","url":"https://history.state.gov/historicaldocuments/frus1961-63v13/d5"}],"topics":["Nuclear cooperation","Nuclear test ban","Occupied Austria","Second World War","Diplomatic service reform","Education"]},"schemaVersion":1}