company in the 3rd Regiment of Artillery commanded by Captain Thomas Stockton and Captain Benjamin Pierce, constituted on January 11, 1812, as Captain Thomas Stockton's Company. Towson's Company was the precursor of today's 2-2 ADA; Beal's/Dyson's/Russel's/Evans' Company, of the 4th Howitzer Battalion, 2 ADA; and Stockton's/Pierce's Company, of the 6th Missile Battalion, 2 ADA. None of these battalions is currently active. Lieutenant Colonel Towson emerged as one of the most competent artillery officers in the American Army. His company distinguished itself at the Battles of Chippewa and Lundy's Lane. Credit for these two campaigns is not shared with the 2nd Air Defense Artillery Regiment, since shared credit is awarded only when at least two subordinate elements of the regiment have earned that credit. 3rd Air Defense Artillery 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. 4th Air Defense Artillery Campaigns: Louisiana 1815 The 4th Air Defense Artillery traces its lineage back to June 1, 1821, when 4th Regiment of Artillery was constituted in the Regular Army and organized from existing units with headquarters at Pensacola, Florida. Two battalions of the 4th Air Defense Artillery are derived from artillery companies that served in the War of 1812: Captain Thomas Murray's Company, 1st Regiment of Artillery, originally constituted on October 20, 1786,