The Delaware Army National Guard is a component of the United States Army and the United States National Guard. National coordination of various state National Guard units are maintained through the National Guard Bureau.

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.