Constituted on 14 May 1874 as the
4th Infantry Regiment, Pennsylvania. Organized on 30 June 1874 from existing independent companies of the 5th and 7th Divisions, Pennsylvania National Guard. consisting of companies in Allentown, Hamburg, Columbia, Reading, Pinegrove and Pottsville. • mustered into federal service from 9 May-6 July 1898 as the
4th Regiment, Pennsylvania Volunteer Infantry and mustered out of federal service 16 November 1898 and reorganized as the 4th Infantry Regiment, Pennsylvania National Guard. • mustered into federal service on 8 July 1916 for Mexican border duty, and mustered out of federal service 15–26 January 1917. • mustered into federal service on 16–27 July 1917. • reorganized and redesignated between 15 August 1917 – 21 March 1918 as the 107th, 108th and 109th Machine Gun Battalions,
28th Division, and as the 149th Machine Gun Battalion and elements of the 150th and 151st Machine Gun Battalions,
42nd Division. demobilized during May 1919. • reorganized between 9 July 1920 – 8 April 1921 as 1st, 2nd and 3rd Separate Battalions of Infantry, Pennsylvania National Guard. • consolidated and redesignated 1 May 1922 as the 213th Artillery (
Antiaircraft) (AA) (
Coast Artillery Corps). • redesignated on 1 August 1921 as the 213th Coast Artillery (AA) This was part of a larger PA ARNG deployment known as "Task Force Keystone." ==Distinctive unit insignia==