This historical publication is the eighth in a series of regimental histories. This series covers in similar fashion each of the infantry and artillery regiments in the Fleet Marine Force, active and reserve. The present narrative not only highlights the significant actions of the 12th Marines, but also furnishes a general history of the developments in Marine Corps artillery. "A Brief History of the 12th Marines" is a concise narrative of the regiment from its initial activation close to half a century ago through its participation in the Vietnam conflict.