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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.

August 2021

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S M T W T F S
Aug 1 2 3 4 5 6 7
1972: Lt. Gen Sam Phillips Becomes DIRNSA....
1943: Australian Coastwatchers Send Code
1918: "Mohawk" Field Code was issued.
1955: Prototype U-2 Flight
1925: Radio Orphan Annie Secret Society
1945: US Dropped Atomic Bomb Over Hiroshima
1944: "The Harvard Mark 1"
1969: VADM Noel Gayler becomes DIRNSA
1990: Iraq Invaded Kuwait
1994: Solomon Kullback Died
1958: Herbert O. Yardley Died
1958: Dr. Louis Tordella became D/DIRNSA
1963: Limited Nuclear Test Ban Treaty
1920: Brigadier John H. Tiltman Joined GC & CS
8 9 10 11 12 13 14
1975: Lt Gen Lew Allen Testifies
1945: Nagasaki
1942: Hedy Markey (Lamarr) Receives Patent
1918: "Allegheny" Field Code was issued.
1961: Berlin Wall Contstruction Began
1944: Spy Velvalee Dickinson Sentenced
2008: Georgia-Russia Cyber Attacks
1972: Last U.S. Ground Combat Unit Leaves Vietnam
1981: IBM PC Debut
1982: Navajo Code Talkers Day Declared
15 16 17 18 19 20 21
1945: Japan Announced Surrender
1858: Early Telegraph Communications
1968: Soviet Invasion
1846: Étienne Bazeries Birth Date
22 23 24 25 26 27 28
1956: U.S. Navy Recon Plane Shot Down
1948: Stone Board Has First Meeting
1892: Elizebeth Smith Friedman Birth Date
1878: Colonel Parker Hitt's Birth Date
1907: Abraham Sinkov was born.
1778: Beginnings of Culper Spy Ring with GEN Washington & MAJ Tallmadge
1914: Russian Navy Seized Codebooks
Poland and Britain signed the Agreement of Mutual Assistance.
29 30 Aug 31 Sep 1 2 3 4
1949: Soviets Detonate Atomic Bomb
1914: German Intercepts of Russian Radio Traffic
Sunday, August 1, 2021
Monday, August 2, 2021
Tuesday, August 3, 2021
Wednesday, August 4, 2021
Thursday, August 5, 2021
Friday, August 6, 2021
Saturday, August 7, 2021
Sunday, August 8, 2021
Monday, August 9, 2021
Wednesday, August 11, 2021
Thursday, August 12, 2021
Friday, August 13, 2021
Saturday, August 14, 2021
Sunday, August 15, 2021
Monday, August 16, 2021
Friday, August 20, 2021
Saturday, August 21, 2021
Sunday, August 22, 2021
Wednesday, August 25, 2021
Thursday, August 26, 2021
Friday, August 27, 2021
Sunday, August 29, 2021
Tuesday, August 31, 2021

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