The 198th Signal Battalion is an Expeditionary Signal Battalion in the Delaware Army National Guard. Delaware is known as the "First State," as referenced in their motto "First Regiment of First State." The unit specializes in command post node communications, providing broadband satellite voice and data connections for brigade sized battlefield elements. The unit includes Headquarters, Headquarters Company located in Wilmington, DE; A Company in Georgetown, DE; B Company in Hodges, SC; and C Company in Wilmington, DE. It is one of several National Guard units with colonial roots and campaign credit for the War of 1812.

The 1st Delaware Infantry Regiment, later known as the 1st Delaware Veteran Infantry Regiment was a United States volunteer infantry regiment raised for Union Army service in the American Civil War. Part of the II Corps it served in the Eastern Theater of the American Civil War.