Commander Naval Security Group and Fleet Cyber Command/Commander TENTH Fleet timeline:

28 July 1916 – US Navy Code and Signal Section established

1918 – Office on Naval Intelligence (ONI) acquired spaces in the sixth wing of the Navy Headquarters Building on Constitution Avenue in the District of Columbia for the Code and Signal Section. The department consisted of 13 officers, 14 males enlisted and 34 “yeomanettes,” a term used at that time for enlisted women. In addition to developing and distributing cryptographic systems, this small group had the responsibility to oversee fleet callsign assignments.

June 1918: Agnes Meyer enlisted in the United States Navy as chief yeoman and was assigned to the Code and Signal Section of the Director of Naval Communications (DNC).

1921 – ONI covertly acquired a photographic copy of the “Imperial Japanese Navy Secret Operating Code-1918.”

1922 – Research Desk established in Security Office of Code and Signals section of Office Department of Naval Communications (DNC)

1922 – OP-20G established until after WWII.

1923 – CNO Request Fleet Forces to listen in on enciphered foreign traffic

1924 – RIP-5 Kana typewriter designed and 4 ordered.  Note: The RIP-5 consisted of a typewriter modified to reproduce the kana for which Japanese Morse code letters stood.  It had been developed at the initiative of Captain, USN, Laurence Safford.

1924-1935- Naval cryptologic service developed operational

1925 – Department of Naval Communications (DNC) requested DCO 14th N.D. assigns one operator to copy Japanese diplomatic traffic

October 1927: CRM Dorman Chauncey arrived in Peiping and established the station.

1927 – Intercept station established at Peking to copy Japanese Diplomatic traffic

1927 – Naval Research Laboratory request to develop HFDF equipment

1 October 1928 – First Kana operator course starts at Main Navy Building in Washington D.C.  This was the first class of On-The-Roof-Gang

January 1929: The first class of On-The-Roof (OTR) graduated with CRM Harry Kidder as instructor. Those completing the course were: CRM Joseph Goldstein, CRM Guy Oliver Billehus, RM1 Keith E. Goodwin, RM1 Martin A. Vandenburg, RM1 B. E. Cloyd, RM1 R. W. Hoffman, and RM1 Truett C. Lusk. Following graduation all seven were sent to Guam.

13 May 1929 – CNO recognized the need for radio intelligence and indicated his intention to establish a radio intelligence office with the Asiatic Fleet and to organize cryptanalytic units afloat.

January 1931 – Experimental HFDF (Rotating Adcock) commissioned at Naval Research Laboratory

1932: RM2 James (Little Jimmy) Pearson boarded a Dollar Line Passenger ship in Seattle Washington

June 1933 – Experimental HFDF developed by Naval Research Laboratory and Bell Laboratories

August 1933 – CNO directs HFDF be installed in 1st and 12th Naval districts.

11 March 1935 – Cryptologic activities named changed to the Communications Security Group.  Also, there is an association of the so called “OP-number”, which was OP-20-G from sometime before 3 April 1923 until 10 July 1946, when OP-20-G became OP-20-2.

June 1938 – Congress authorized $85,000 for improvement Radio Facilities Corregidor

January 1940 – Department of Naval Communications (DNC) informed on status of plans for setting up strategic HFDF stations on Midway, Johnston and Palmyra in case of emergency

October 1940 – Cavite moved to Corregidor and Shanghai decommissioned

November 1940 – 20-G request immediate procurement of 20 RIP-5

11 September 1940 – Army and Navy Agreement of joint exploitation of PURPLE.

December 1940 – Strategic DF station established at Toro Point

May 1941 – Request 30 additional RIP-5

July 1941 – 22 Navigational DF stations turned over to Coast Guard

July 1941 – CNO request further development of Medium Frequency fixed Adcock DF for strategic use.

January 1942 – Intercept Station “H” moved to Wahiawa.

April 1942 – Corregidor evacuated to Melbourne

September 1942 – School facilities at Bainbridge enlarged to accommodate 100 men

September 1942 – School facilities at Cheltenham enlarged to accommodate 75 men

Naval Security Station moved to Nebraska Avenue, February 7, 1943

April 1943 – $475,000 authorized or enlargement of intercept facilities at Wahiawa

10 July 1946 – All Navy Communications Intelligence Activities were officially named Communications Supplementary Activity (CSA).  CSA’s were Deputy Chief of Communications for Communications Supplementary Activity (OP-20-2)

29 August 1947 – All Communications Supplementary Activities (CSK’s) were disestablished and became components (departments) of the parent command under the commander officer

6 November 1948 – Head Supplementary Activity Branch, Naval Communications Division (OP-20-2) established under Captain J.N. Wenger, USN

20 May 1949 – The Armed Forces Security Agency (AFSA) established

1 July 1949 – Captain E. S. L. Goodwin, USN becomes OP-20-2

25 August 1949 – First Submarine DIRSUP Operator mission (TELINT)

1 September 1949 – Captain John S. Holtwick, USN becomes OP-20-2

28 June 1950 – Naval Security Group under Head Security Branch (OP-202) established under Captain John S. Holtwick, USN

21 September 1950 – Naval Communications Annex Washington, 3801 Nebraska Avenue, NW, Washington, D.C. changed to Navy Security Station, 3801 Nebraska Avenue, Washington, D. C.

December 1950 – “Navy” in Navy Security Group changed to “Naval.” Navy Security Station 3801 Nebraska Avenue, NW, Washington, D.C. changed to Naval Security Station.  Naval Security Group under Chief of Naval Communications Service was commanded by Captain John S. Holtwick, USN

July 1952 – Naval Communications Service changed to Naval Communications

24 October 1952 – The National Security Agency established

21 December 1953 – Registered Publications Issuing Office (s) returned to Naval Security Group

June 1954 – Reorganization OP-20-2 becomes OP-30-2.  OP-30-G becomes Head Naval Security Group under Captain Morrison, USN.  Captain Morrison is the first “Head” of the Naval Security Group

May 1959 – Reorganization OP-30 becomes OP-94.  Rear Admiral Bernard F. Roeder, USN becomes OP-94-G (Head Naval Security Group)

7 July 1961 – Naval Security Group Headquarters established.  Rear Admiral Leslie R. Schulz, USN first Commanding Officer

July 1961 – The title “Head Naval Security Group” changed to “Director Naval Security Group”

25 September 1965 – NSGA Kamiseya, Japan fire, killing 12 Cryptologists

8 June 1967 – USS Liberty (AGTR-5) attacked, killing 34 men, many were Cryptologists

22 January 1968 – USS Pueblo (AGTR 2) captured by the North Koreans

June 1968 – Naval Security Group Command established under a flag officer.  Rear Admiral Ralph E. Cook, USN, become first Commander

23 December 1968 – Crew of USS Pueblo (AGER 2) released after 11 months in captivity/imprisonment in North Korea.

15 April 1969 – EC-121 Begger Shadow shot down over the Sea of Japan, off the coast of North Korea, 31 men were killed, many were Cryptologists

12 December 1971 – RG -407 C-2A transport aircraft went down between the Philippians and Vietnam, killing 10 Sailors, six were Cryptologists

26 March 1976 – Communication Technician rating changed to Cryptologic Technician.

3 December 1979 – NSGA Sabana Seca Puerto Rico was attacked.  CTO1 John Ball and RM3 Emil White were killed and 10 others were wounded.

25 January 1987 – EA-3B went down in the Mediterranean killing CTI1 Patrick r. Price and CTI3 Craig H. Rudolf.  Five other killed.

1995 – Relocation of Commander Naval Security Group (CNSG) HQ from Naval Security Station, Nebraska Ave in Washington D.C. to Fort Meade, MD.

1 April 2001 – Hainan Island incident with an EP-3E.

11 July 2002 – Naval Network Warfare Command (NETWARCOM) established.

1 October 2003 – Merger of the Cryptologic Technician (Technical) (CTT) and Electronic Warfare Technician (EW) ratings

2005 – Naval Security Group aligned under Naval Network Warfare Command (NETWARCOM).  Mission fundamentally changed as Navy’s lead for IO, Networks and Space.

30 September 2005 – Commander Naval Security Group (CNSG) disestablished.

1 October 1 2005 – All NSGAs were was realigned under the Naval Network Warfare Command and renamed the Navy Information Operations Command (NIOC).

12 December 2005 – Merger of the Information Systems Technician (IT) and Cryptologic Technician (Communication) (CTO) ratings

6 July 2007 – CTT1(SW) Steven P. Daugherty, USN, KIA in Iraq while supporting Naval Special Warfare.

2008 – CTM rating disestablished and re-established in the same year

17 July 2008 – 1st Lt. Jason D. Mann, USMC, was KIA in Garmsir, Afghanistan while serving as an Arab linguist, reconnaissance professional and ground intelligence officer.

20 September 2008 – CTM3 Mathew J O’Bryant, USN, KIA while serving in Islamabad, Pakistan.

29 January 2010 – U.S. Fleet Cyber Command/U.S. Tenth Fleet established.  U.S. Fleet Cyber Command is an echelon 2 command and U.S. Tenth Fleet is an echelon 3 command.  The mission is Electronic Warfare, Signal Intelligence and Cyber Operations.

2010 – Cryptologic Community Foundational Principles released establishing SIGINT, CNO and EW as core principles of the community.

21 May 2010 – United States Cyber Command established.

21 September 2010 – CTRCS David “Blake” McLendon, USN, KIA in Afghanistan while supporting Naval Special Warfare.

5 February 2011 – SGT Lucas T. Pyeatt, USMC, KIA while serving in Afghanistan.

6 August 2011 – IT1 Jared W. Day, USN and CTR1 Michael J. Strange, USN, KIA in Afghanistan while supporting NAVAL Special Warfare.

17 January 2012 – LT Thomas C. Fouke, USN, died during physical training preparing to support Naval Special Warfare.

13 March 2013 – CTTC(EXW/IDW/SW) Christian Pike, USN, died in Landstuhl, Germany due to head wound/injuries received while providing intelligence support in support of Naval Special Warfare and Afghan Commando operations.

9 June 2017 – NIOC Maryland redesignated as Cryptologic Warfare Group-SIX and simultaneously three separate commands were established subordinated to CWG-SIX.  The following summer three more commands were established under CWG-SIX. NIOC Maryland was formally known as NSGA Maryland.

17 May 2018, 133 U.S. Cyber Command’s cyber mission force teams achieved full operational capability.

16 January 2019 – CTICS(IW/EXW) Shannon M. Kent, USN, KIA in Manbij, Syria while supporting Combined Joint Task Force – Operation Inherent Resolved.

Note that there are several other major events that have occurred that are not reported in this post.

Multiple sources