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"On This Date in History" Calendar

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

March 2021

This Month
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Month
Year
S M T W T F S
Feb 28 Mar 1 2 3 4 5 6
1917: Zimmermann Telegram released to U.S. press.
1971: Cryptologic pioneer Colonel Parker Hitt died.
1975: STONEHOUSE site officially closed.
1942: Station HYPO began reading Japanese system JN-25.
1924: William Friedman testifies re: Teapot Dome scandal.
1918: German ADFGVX cipher first used.
1971: Army RU-8 shot down, Vietnam.
1946: BRUSA Communications Intelligence Agreement
1930: First hire at SIS - Annie Louise Newkirk
1832: Death of Jean-François Champollion.
1951: Shelby Patterson became chief of the AFSA school.
1971: Loss of Army UH-1 & its crew.
7 8 9 10 11 12 13
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.
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
1969: Death of Ralph J. Canine, first DIRNSA.
1918: Radio Intelligence Service, Mexican border, was established.
1942: Evacuation of Station CAST.
1954: USAFSS started Airborne Reconnaissance Program
14 15 16 17 18 19 20
1951: Seoul, South Korea, recaptured by UN forces.
1946: CREAM replaced ULTRA.
1975: Details of Lucifer encryption algorithm published in the "Federal Register."
1974: Horst Feistel received a patent for "Block Cipher Cryptographic System."
1938: SIS started receiving messages from Purple.
1981: USAF RC-135 lost, Shemya.
2003: Operation Iraqi Freedom began.
21 22 23 24 25 26 27
1962: ASA flew first airborne radio direction finding mission in Vietnam.
1999: NATO began Operation ALLIED FORCE in Kosovo.
1999: Lt Gen Michael Hayden, USAF, became DIRNSA.
28 29 30 Mar 31 Apr 1 2 3
1994: Griffiss Air Force Base finds malware
1938: Chief Signal Officer Mauborgne permitted to perform intercept and cryptologic services for peacetime training.
1973: Last U.S. troops left Vietnam.
Monday, March 1, 2021
Tuesday, March 2, 2021
Thursday, March 4, 2021
Friday, March 5, 2021
Saturday, March 6, 2021
Sunday, March 7, 2021
Monday, March 8, 2021
Tuesday, March 9, 2021
Wednesday, March 10, 2021
Thursday, March 11, 2021
Friday, March 12, 2021
Sunday, March 14, 2021
Monday, March 15, 2021
Wednesday, March 17, 2021
Friday, March 19, 2021
Saturday, March 20, 2021
Monday, March 22, 2021
Wednesday, March 24, 2021
Friday, March 26, 2021
Sunday, March 28, 2021
Tuesday, March 30, 2021

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