page_title: Active regular United States Army units with campaign credit for the War of 1812
section_title: 3rd Air Defense Artillery
hierarchical_section_title: Active regular United States Army units with campaign credit for the War of 1812 / Air Defense Artillery / 3rd Air Defense Artillery
caption_attribution_description: English: Distinctive Unit Insignai of the 3rd Air Defense Artillery
context_page_description: Twenty-three currently active battalions of the Regular Army earned credit for campaigns during the War of 1812: two Air Defense Artillery battalions, six Field Artillery Battalions and seventeen Infantry battalions. These twenty-three battalions represent two Air Defense Artillery, four Field Artillery and seven Infantry regiments. Three additional Air Defense Artillery regiments have been awarded shared credit for War of 1812 campaigns, but the lineages of the artillery companies that earned those credits have not been perpetuated by currently active battalions.
  There are also twenty-four Army National Guard units with campaign credit for the War of 1812.
context_section_description: Campaigns: Canada
  The 3rd Air Defense Artillery was constituted on June 1, 1821, as the 3rd Regiment of Artillery and organized from existing units with headquarters at Fort Washington, Maryland.  Two of the companies used to form the new 3rd Regiment of Artillery in 1821 were artillery companies that had earned credit for the Canada Campaign through service along the Canada–US border: Captain Addison B. Armistead's Company, 2nd Regiment of Artillery, originally constituted in 1798 as Captain John Lillie's Company, 2nd Regiment of Artillerists and Engineers, which, after several redesignations became Captain Addison Armistead's Company, 2nd Regiment of Artillery on January 11, 1812; and Captain A. C. W. Fanning's Company, 3rd Regiment of Artillery, constituted on January 11, 1812, as a company in the 3rd Regiment of Artillery and organized in Sacketts Harbor, New York, in July, 1812, and redesignated as Captain Fanning's Company, Corps of Artillery in May, 1814.
  Fanning's Company played an important role in the defense of Fort Erie during Major General Jacob Brown's invasion of the Niagara Peninsula in 1814.
  Armistead's Company was the precursor of the 1-3 ADA; Fanning's Company, of the 2-3 ADA.  Neither 1-3 ADA nor 2-3 ADA is currently active.
caption: Distinctive Unit Insignia: 3 ADA
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