[1] The brigade mission is to provide and defend the Pacific LandWarNet and expeditionary communications capabilities as part of U.S. Pacific Command's Theater Information Grid and the Army Enterprise in support of Joint, Combined, and Army Forces, enabling the battle command and information superiority to the Warfighter.

Today's brigade headquarters therefore traces its legacy in two directions: On the TOE side, the 516th Signal Brigade was originally activated as the 3367th Signal Service Battalion on 25 November 1944 at New Guinea; and on the TDA side, the 1106th Signal Brigade was a successor to the United States Army Strategic Communications Command-Pacific (STRATCOM-PAC), which was activated on 1 September 1964 at Schofield Barracks, Hawaii.

During World War II, the 3367th Signal Service Battalion earned battle streamers for the campaigns of New Guinea, Leyte, Southern Philippines, and Luzon, with another streamer recognizing the Philippine Presidential Unit Citation.

Each of the 516th's Signal Battalions—the 30th today located in Hawaii, 58th in Okinawa, 59th in Alaska, 78th in Japan, and the 307th Integrated Theater Signal Battalion located in Hawaii and Alaska—also earned World War II battle streamers in their original incarnations.

The 1106th's other predecessor command, STRATCOM-PAC, had communications-electronics responsibilities during the 1960s and 1970s for the United States Army in Vietnam, Korea, Japan, Okinawa, the Philippines, Taiwan, and Thailand, as well as Hawaii—a geographical area spanning one-third of the earth's surface.