California State Military Department
The California State Military Museum
A United States Army Museum Activity
Preserving California's Military Heritage
Lineages and Honors of the California National Guard
159th Infantry Regiment (Fifth California)
 
Constituted 12 December 1879 in the California National Guard as the 2d Infantry Battalion and organized from existing companies
 
Redesignated 30 December 1879 as the 5th Infantry Battalion
 
Expanded, reorganized, and redesignated 4 August 1885 as the 5th Infantry Regiment with Headquarters at San Francisco
 
(Six companies mustered into Federal service 6-9 July 1898 at Fruitvale as elements of the 8th California Volunteer Infantry; mustered out of Federal service 28 January - 6 February 1899 in Washington and California)
 
Mustered into Federal service 28 June 1916 at Sacramento; mustered out of Federal service 7 October 1916 at Sacramento
 
Drafted into Federal service 5 August 1917
 
Consolidated 24 September - 1 November 1917 with the 2d Infantry Regiment (less 2d Battalion, Companies L and M, and Sanitary Detachment), California National Guard; consolidated unit reorganized and redesignated as the 159th Infantry and assigned to the 40th Division
 
Demobilized 1 May 1919 at the Presidio of San Francisco, California
 
Elements of the former 5th Infantry Regiment reorganized 1920-1921 in the California National Guard as seven independent companies
 
Reorganized and redesignated 2 October 1921 as the 159th Infantry and assigned to the 40th Division; Headquarters Federally recognized 14 June 1922 at Berkeley
(Location of Headquarters changed 25 March 1931 to Oakland) Inducted into Federal service 3 March 1941 at home stations
 
Relieved 29 October 1941 from assignment to the 40th Division and assigned to the 7th Division (later redesignated as the 7th Infantry Division)
 
Relieved 23 August 1943 from assignment to the 7th Infantry Division
 
Inactivated 4-6 November 1945 at Camp Shanks, New York, and Camp Kilmer, New Jersey
 
Assigned 5 August 1946 to the 49th Infantry Division
 
Reorganized and Federally recognized 28 January 1947 with Headquarters at Alameda
 
Reorganized 1 May 1959 as a parent regiment under the Combat Arms Regimental System, to consist of the 1st and 2d Battle Groups, elements of the 49th Infantry Division
 
Reorganized 1 March 1963 to consist of the 1st Battalion, an element of the 49th Infantry Division, and the 2d Battalion, an element of the 49th Infantry Brigade
 
Reorganized 29 January 1968 to consist of the 1st Battalion and the 2d Battalion, an element of the 49th Infantry Brigade
 
Reorganized 13 January 1974 to consist of the 1st and 2d Battalions, elements of the 40th Infantry Division
 
Reorganized 1 November 1976 to consist of the 2d Battalion, an element of the 40th Infantry Division
 
Withdrawn 19 January 1988 from the Combat Arms Regimental. System and reorganized under the United States Army Regimental System, with Headquarters at San Jose

Campaign Participant Credit
World War I
Streamer without inscription
World War II
Asiatic-Pacific Theater:
Aleutian Islands
European-African-Middle Eastern Theater:
Streamer without inscription
Company A (Concord), 2d Battalion, additionally entitled to:
World War II
Asiatic-Pacific Theater:
Bismarck Archipelago Luzon (with arrowhead)
Southern Philippines
Support Company (Gilroy), 2d Battalion, additionally entitled to:
War with Spain:
Manila
Philippine insurrection:
Manila
World War I:
St. Mihiel
Meuse-Argonne
World War II
Asiatic-Pacific Theater:
Central Pacific
 
Decorations

Company A (Concord), 2d Battalion, entitled to:
Philippine Presidential Unit Citation, Streamer embroidered 17 OCTOBER 1944 TO 4 JULY 1945
 
BY ORDER OF THE SECRETARY OF THE ARMY:
 
 
HAROLD W. NELSON
Brigadier General, United States Army
Chief of Military History
16 December 1991

Updated 23 March 2009


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