{"id":623677,"date":"2026-01-18T22:07:30","date_gmt":"2026-01-18T21:07:30","guid":{"rendered":"https:\/\/cronologia-universale.it\/november-4-1942-3\/"},"modified":"2026-01-18T22:07:30","modified_gmt":"2026-01-18T21:07:30","slug":"november-1-2-1939","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/november-1-2-1939\/","title":{"rendered":"November 1-2, 1939"},"content":{"rendered":"<p>British intelligence agency MI6 receives an unsigned letter (the &#8220;Oslo Letter&#8221; or &#8220;Oslo Report&#8221;) revealing mysterious details about German secret weapons in one of the most spectacular leaks in the history of military intelligence. The report, compiled by German physicist Hans Ferdinand Mayer, describes several German technological innovations for military use. The letter remains largely ignored by the British.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>British intelligence agency MI6 receives an unsigned letter (the &#8220;Oslo Letter&#8221; or &#8220;Oslo Report&#8221;) revealing&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-623677","post","type-post","status-publish","format-standard","hentry","category-vg-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>November 1-2, 1939 - Cronologia Universale<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cronologia-universale.it\/en\/november-1-2-1939\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"November 1-2, 1939 - Cronologia Universale\" \/>\n<meta property=\"og:description\" content=\"British intelligence agency MI6 receives an unsigned letter (the &#8220;Oslo Letter&#8221; 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