The unit specializes in command post node communications, providing broadband satellite voice and data connections for brigade sized battlefield elements.

The 1st Delaware Regiment was raised on 9 December 1775 for service with the continental army under the command of Colonel John Haslet.

The unit's lineage and honors include 36 battle streamers from nearly every major war in US history.

This marked the first time since the Civil War that the 198th deployed as a full Battalion with its South Carolina based B Company.

Authorized 9 September 1775 in the Continental Army as the Delaware Regiment (also known as Haslet's Regiment) Organized 13 January 1776 to consist of the following companies under the command of Colonel John Haslet: Captain Joseph Stidham's Company – New Castle County Captain Jonathan Caldwell's Company – Kent County Captain David Hall's Company– Sussex County Captain Henry Darby's Company – New Castle County Captain Charles Pope's Company – Kent County Captain Nathan Adams' Company – Kent County Captain Samuel Smith's Company – New Castle County Captain Joseph Vaughan's Company – Sussex County Mustered into Continental Service 11 – 12 April 1776 at Dover and Lewistown Reorganized 1 January 1777 as Colonel David Hall's Regiment as follows: Captain John Patton's Company Captain Robert Kirkwood's Company Captain James Moore's Company Captain Enoch Anderson's Company Captain Thomas Holland's Company Captain John Learmonth's Company Captain Gord Hazzard's Company Captain Peter Jaquett's Company Reorganized September 1780 – August 1781 from new and existing companies as follows: Captain Robert Kirkwood's Company Captain Peter Jaquett's Company Captain William McKennan's Company (mustered in August 1781 at Christiana Bridge) Captain Paul Quenoualt's Company (mustered in August 1781 at Christiana Bridge) Mustered out of Continental service 3 November 1783 at Christiana Bridge Reorganized in Delaware as follows: Light Infantry, 1st Regiment organized by 10 October 1793 at Wilmington, under the command of Captain David Bush Mustered into federal service 23 May 1813 at Wilmington; mustered out of federal service 31 July 1813; mustered into federal service 28 August 1814; mustered out of federal service 3 January – 13 March 1815 Artillery Company, 2d Brigade – prior to 9 April 1793 at Dover, under the command of Captain Furbee Mustered into federal service 23 May 1813 at Dover; mustered out of federal service 2 September 1814 1st Company, Light Infantry, 8th Regiment – prior to 22 February 1799 at Georgetown, under the command of Captain Benton Harris Mustered into federal service 2 March 1813; mustered out of federal service 4 May 1813 at Lewes; mustered into federal service 6 May 1813; mustered out of federal service 31 July 1813; mustered into federal service 6 August 1814; mustered out of federal service 11 January 1815 Reorganized 6 March 1827 as the 1st Company of Light Infantry, 1st Battalion Reorganized in 1831 as the Light Infantry Battalion, attached to the 8th Regiment of Delaware Militia, with companies as follows: Georgetown Minute Men – organized 19 July 1831, Captain Edward L. Wells commanding Volunteer Company, Light Infantry – organized 14 September 1831, Captain Coulter commanding Volunteer Company, Light Infantry – organized 14 November 1831, Captain Thomas McIlwain Commanding Volunteer Company, Light Infantry – organized 17 November 1831, Captain Gilley G. Short, commanding Reorganized from 1849 to 1861 as separate companies as follows: Kirkwood Rifle Corps – organized 30 June 1846 at Georgetown, Captain Caleb R. Layton, commanding; attached to the 13th Regiment of Militia Company B, Artillery – organized 2 February 1849 at Wilmington; redesignated 29 February 1858 as the National Guards Columbia Rifle Corps – organized prior to July 1858 at Wilmington Companies A and B, Delaware Blues – organized prior to September 1860 as Bell and Everett Political Clubs Union Volunteers – organized in 1861 at Camden McLane Rifles – organized prior to 1861 at Wilmington Reorganized 2–22 May 1861 as the 1st Delaware Volunteer Infantry Regiment and mustered into federal service at Wilmington; mustered out of federal service 2–26 August 1861 Reorganized 10 September-19 October 1861 and mustered into federal service for three years at Wilmington; mustered out of federal service 12 July 1865 near Munson's Hill, Virginia Reorganized 4 April 1869 in the Delaware Volunteers as the 1st Zouave Regiment, with the organization of Company A (Smyth Zouaves) Reorganized in 1880 in the Organized Militia of Delaware as the Regiment of Infantry (Organized Militia of Delaware redesignated 17 April 1885 as the Delaware National Guard) Mustered into federal service 9–19 May 1898 as the 1st Delaware Volunteer Infantry at Middletown; mustered out of federal service (less Companies A, B, G, and M) 16 November 1898 at Wilmington (Companies A, B, G, and M mustered out of federal service 19 December 1898 at Wilmington) Reorganized during 1899–1900 in the Delaware National Guard as the 1st Infantry Regiment Mustered into federal service 8–9 July 1916 at New Castle; mustered out of federal service 15–16 February 1917 Called into federal service 25 July 1917; drafted into federal service 5 August 1917 Regiment (less Headquarters elements and Companies A, D, and K) reorganized and redesignated 9–14 October 1917 as the 3d Battalion, 114th Infantry and assigned to the 29th Division Reorganized and redesignated 27 February 1918 as the 59th Pioneer Infantry and relieved from assignment to the 29th Division Demobilized (less Companies B, C, and D) 8 July 1919 at Camp Dix, New Jersey (Companies B, C, and D demobilized 7 August 1919 at Camp Upton, New York) Reorganized and federally recognized 15 September 1921 in the Delaware National Guard as the 198th Artillery Regiment (Coast Artillery Corps), with headquarters at Wilmington, and the Separate Battalion, Coast Artillery, Delaware National Guard (see ANNEX 1) 198th Artillery (Coast Artillery Corps), redesignated 16 August 1924 as the 198th Coast Artillery Inducted into federal service 16 September 1940 at Wilmington (3d Battalion organized 1 January 1943 while in federal service) Regiment broken up 1 March 1944 and its elements reorganized and redesignated as follows: Headquarters and Headquarters Battery as Headquarters and Headquarters Battery, 198th Antiaircraft Artillery Group Inactivated 24 December 1945 at Camp Anza, California Reorganized and federally recognized 27 August 1946 at Wilmington Location changed 13 January 1958 to New Castle 1st Battalion as the 736th Antiaircraft Artillery Gun Battalion Inactivated 2 January 1946 at Camp Stoneman, California Reorganized and federally recognized 16 October 1946 at Wilmington Expanded 10 October 1949 to form the 736th Antiaircraft Artillery Gun Battalion and the 156th Antiaircraft Artillery Automatic Weapons Battalion 156th Antiaircraft Artillery Automatic Weapons Battalion redesignated 20 July 1951 as the 156th Antiaircraft Artillery Gun Battalion; on 1 October 1953 as the 156th Antiaircraft Artillery Battalion 736th Antiaircraft Artillery Gun Battalion ordered into active federal service 29 August 1950 at Wilmington; released from active federal service 2 August 1952 and reverted to state control Reorganized and redesignated 1 October 1953 as the 736th Antiaircraft Artillery Gun Battalion 2d Battalion as the 945th Antiaircraft Artillery Automatic Weapons Battalion Inactivated 15 February 1946 at Hokkaido, Japan Reorganized and federally recognized 17 October 1946 with headquarters at Dover Redesignated 24 October 1949 as the 193d Antiaircraft Artillery Gun Battalion Reorganized and redesignated 20 July 1951 as the 193d Antiaircraft Artillery Automatic Weapons Battalion Redesignated 1 October 1953 as the 193d Antiaircraft Artillery Battalion 3d Battalion as the 373d Antiaircraft Artillery Battalion Inactivated 29 December 1945 at Camp Stoneman, California Consolidated 16 May 1946 with Headquarters and Headquarters Battery, 198th Antiaircraft Artillery Group Headquarters and Headquarters Battery, 198th Antiaircraft Artillery Group, 736th, 156th, 193d, 280th (see ANNEX 1), and 945th (organized 20 November 1956) Antiaircraft Artillery Battalions consolidated 1 April 1959 to form the 198th Artillery, a parent regiment under the Combat Arms Regimental System, to consist of the 1st, 2d, 4th, and 5th Gun Battalions, the 3d Automatic Weapons Battalion, and the 6th Detachment Reorganized 1 April 1962 to consists of the 1st, 2d, 3d, 4th, and 5th Automatic Weapons Battalions and the 6th Detachment Reorganized 1 May 1963 to consist of the 1st, 2d, 3d, and 4th Automatic Weapons Battalions and the 6th Detachment Reorganized 31 January 1968 to consist of the 1st, 2d, and 3d Battalions Regiment broken up 1 January 1970 and its elements reorganized and redesignated as follows: 1st and 2d Battalions consolidated to form the 198th Signal Battalion Headquarters and Headquarters Battery, 3d Battalion as Headquarters and Headquarters Detachment, 198th Transportation Battalion (see ANNEX 2) (remainder of 3d Battalion – hereafter separate lineage) Reorganized and redesignated 1 April 1979 as the 198th Signal Battalion (Federal recognition withdrawn 15 April 1989 from Company B, 198th Signal Battalion) Reorganized and redesignated 1 September 1990 as Headquarters and Headquarters Detachment, 198th Signal Battalion (Companies A and C concurrently reorganized as Companies C and B, 242d Signal Battalion - hereafter separate lineages) Ordered into active federal service 28 July 2006 at Wilmington; released from active federal service 23 January 2008 and reverted to state control Consolidated 1 September 2007 with the 280th Signal Battalion (see ANNEX 2), and consolidated unit reorganized in the Delaware and South Carolina Army National Guard as the 198th Signal Battalion Ordered into active federal service 9 April 2013 at home stations; released from active federal service 13 May 2014 and reverted to state control

The distinctive unit insignia was originally approved for the 198th Coast Artillery on 13 Jun 1934.

That for the regiments and separate battalion of the Delaware National Guard: On a wreath of the colors, Argent and Gules, a griffin's head erased Azure eared and beaked Or, langued Gules, collared Sable, fimbriated Argent and thereon three plates.