AIR DEFENSE ARTILLERY Round All Metal Sign 14 x 14"

From Special Operations Group, presented by "Military Insignia 3D" collection by Serge Averbuk, 

AIR DEFENSE ARTILLERY Round All Metal Sign 14 x 14".   We hand make all of our custom metal shapes in the USA using heavy gauge american steel and a process known as sublimation, where the image is baked into a powder coating for a durable and long lasting finish. This custom metal shape is drilled and riveted for easy hanging.

The Air Defense Artillery branch of the United States Army that specializes in anti-aircraft weapons (such as surface to air missiles). In the U.S. Army, these groups are composed of mainly air defense systems such as the Patriot Missile System, Terminal High Altitude Area Defense (THAAD), and the Avenger Air Defense system which fires the FIM-92 Stinger missile. The Air Defense Artillery branch descended from Anti-Aircraft Artillery (part of the U.S. Army Coast Artillery Corps until 1950, then part of the Artillery Branch) into a separate branch on 20 June 1968. On 1 December 1968, the ADA branch was authorized to wear modified Artillery insignia, crossed field guns with missile. The Branch Motto, "First To Fire", was adopted in 1986 by the attendees of the ADA Commanders' Conference at Fort Bliss. The motto refers to a speech given by General Jonathan Wainwright to veterans of the 200th Coast Artillery (Antiaircraft) stating they were the 'First to Fire' in World War II against the Empire of Japan.

On 10 October 1917 an Antiaircraft Service in the American Expeditionary Force (AEF) was created at Arnouville-Les-Gonesse where an antiaircraft school was established. The antiaircraft units were organized as serially numbered battalions during the war, as follows:

1st Antiaircraft Battalion through the 10th Antiaircraft Battalion (redesignated as numbered antiaircraft sectors in November 1918, all demobilized by January 1919)
1st AA Machine Gun Battalion through the 6th AA Machine Gun Battalion. These units were organized by Col. James A. Shipton[5] and were demobilized January–May 1919.
The National Defense Act of 1920 formally assigned the air defense mission to the Coast Artillery Corps, and 4 battalions were organized in 1921. In 1924, under a major reorganization of the Coast Artillery, the battalions were reorganized as regiments. There were also 42 Organized Reserve antiaircraft regiments in 8 brigades; however, many of the Reserve units only had a small number of personnel assigned, and many were demobilized without activation during World War II.