 Following this, the regiment was merged with the 6th Infantry.The second 29th Infantry was constituted on 3 May 1861, as the 3d Battalion, 11th Infantry, one of the nine "three-battalion" regiments of regulars, each battalion containing eight companies of infantry, in contrast to the original ten regular regiments of infantry, which were organized on the traditional ten-company line.Following the Civil War, the Army was reorganized by Congress in July 1866, and the 11th was divided into three regiments, each battalion receiving two additional companies and being organized along traditional lines.