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"On This Date in Cryptologic History" Calendar

Learn about a wide variety of historical events related to cryptology, computers, math, cybersecurity, Intelligence, and more.

March 2024

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S M T W T F S
25 26 27 28 Feb 29 Mar 1 2
1917: Zimmermann Telegram released to U.S. press.
1971: Cryptologic Pioneer Colonel Parker Hitt.
1918: German ADFGVX cipher first used.
1930: First hire at SIS - Annie Louise Newkirk
1951: Shelby Patterson became chief of the AFSA school.
1971: Loss of Army UH-1 & its crew.
3 4 5 6 7 8 9
1832: Death of Jean-François Champollion.
1942: Station HYPO began reading Japanese system JN-25.
1924: William Friedman testifies re: Teapot Dome scandal.
1973: 509th Radio Research Group was resubordinated.
1953: "Direct" SIGINT support to tactical air control center began on Cho Do Island.
1967: USAF EC-47 loss in Vietnam.
1971: Army RU-8 shot down, Vietnam.
1946: BRUSA Communications Intelligence Agreement
1969: Death of Ralph J. Canine, first DIRNSA.
1975: STONEHOUSE site officially closed.
1954: USAFSS started Airborne Reconnaissance Program
10 11 12 13 14 15 16
1876: First successful voice transmission over Bell's telephone.
1935: Navy cryptologic organization redesignated OP-20-G as Communications Security Group.
1951: AFSA Training Branch Established
1951: Seoul, South Korea, recaptured by UN forces.
1946: CREAM replaced ULTRA.
1918: Radio Intelligence Service, Mexican border, was established.
1942: Evacuation of Station CAST.
1981: USAF RC-135 lost, Shemya.
17 18 19 20 21 22 23
1974: Horst Feistel received a patent for "Block Cipher Cryptographic System."
1938: SIS started receiving messages from Purple.
1962: ASA flew first airborne radio direction finding mission in Vietnam.
2003: Operation Iraqi Freedom began.
24 25 26 27 28 29 30
1999: NATO began Operation ALLIED FORCE in Kosovo.
1999: Lt Gen Michael Hayden, USAF, became DIRNSA.
1994: Griffiss Air Force Base finds malware
Vietnam Veterans Day
1938: Chief Signal Officer Mauborgne permitted to perform intercept and cryptologic services for peacetime training.
1973: Last U.S. troops left Vietnam.
Mar 31 Apr 1 2 3 4 5 6
Friday, March 1, 2024
Saturday, March 2, 2024
Monday, March 4, 2024
Tuesday, March 5, 2024
Wednesday, March 6, 2024
Thursday, March 7, 2024
Friday, March 8, 2024
Saturday, March 9, 2024
Sunday, March 10, 2024
Monday, March 11, 2024
Tuesday, March 12, 2024
Thursday, March 14, 2024
Friday, March 15, 2024
Tuesday, March 19, 2024
Wednesday, March 20, 2024
Friday, March 22, 2024
Sunday, March 24, 2024
Tuesday, March 26, 2024
Thursday, March 28, 2024
Friday, March 29, 2024
Saturday, March 30, 2024

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