
1st Battalion (west of the Cascades) constituted and organized 9 March, 1886 and 2nd Battalion (east of the Cascades) was constituted 7 April, 1887 in the Washington Territory, comprising existing independent companies of the military organized in 1880-1884;
Capitol Guards (Olympia, 1883)
Seattle Rifles (1883)
Tacoma Guards(1884)
Queen City Guard (Seattle, 1884)
Grant Guards (Walla Walla, 1880)
Klickitat County Guards (Goldendale, 1884)
(Active militia Washington Territory re-designated Washington (Territory) National Guard 28 January 1888.)
2nd Infantry Regiment reorganized and re-designated 23 July 1895 as 1st Infantry Battalion.
1st Infantry Regiment reorganized and re-designated in 1897 as 2nd Infantry Battalion.
Elements of the 1st and 2nd Infantry Battalions consolidated in part, re-designated 1st Regiment, Washington Volunteer Infantry, and mustered into Federal service 6-13 May 1898 at Tacoma; mustered out 1 November 1898 at San Francisco, California.
Remaining companies of 1st and 2nd Infantry Battalions re-organized as Independent Battalion, Washington Volunteer Infantry, and mustered into Federal service 2-15 July 1898 at Tacoma, mustered out 28 October 1898 at Vancouver Barracks.
Elements re-organized and consolidated with 1st and 2nd Infantry Regiments, Washington National Guard, (organized in 1898), and re-designated 9 November 1899 as 1st Infantry Regiment.
(Companies C, K, and M withdrawn, converted, and re-designated 5th, 3rd and 2nd Companies Coast Artillery Reserve Corps; Company A disbanded, then re-organized in 1909 as 4th Company, Coast Artillery Reserve Corps)
Mustered into Federal service 28 June 1916 at Camp Elmer M. Brown, Washington, for Mexican Border; mustered out 8 October 1916 at American Lake.
Called into Federal service 25 March 1917; drafted into Federal service 5 August 1917.
Consolidated with elements of 3rd Infantry Regiment, District of Columbia National Guard, and re-designated 19 September 1917 as 161st Infantry, an element of the 41st Division.
Demobilized 1-8 March 1919 at Camp Dix, New Jersey and Camp Dodge, Iowa.
State of Washington elements re-organized 1 January 1921, in the Washington National Guard as 161st Infantry; assigned to 41st Division.
(1st Battalion and Supply Company withdrawn, converted, and re-designated 10 May 1921, as 146th Artillery Regiment)
Inducted into Federal service 16 September 1940, at Spokane.
Relieved from assignment to 41st Division 3 August 1942.
Assigned to 25th Infantry Division 3 August 1942.
Relieved from assignment to 25th I.D. and inactivated 1 November 1945 at Ragoya, Japan.
Assigned to 41st I.D. 17 June 1946.
Re-organized and Federally recognized 24 March 1947 with Headquarters at Spokane.
Re-organized 15 April 1959 as 161st Infantry, a parent regiment under the Combat Arms Regimental System, to consist of the 1st and 2nd Battle Groups, elements of the 41st I.D.
Re-organized 1 March 1963 to consist of the 1st and 2nd Battalions.
Re-organized 1 January 1968 of the 1st, 2nd, and 3rd Battalions, non-divisional units.
Campaign Participation Credit
Philippine Insurrection 1898
Manila
Luzon 1899
World War I (without inscription)1917
World War II 1941
Guadalcanal 1942
Luzon 1943
Northern Solomons 1943