Official LinkedIn page of the U.S. Army Watervliet Arsenal. Email: usarmy.watervliet.tacom.list.wvapublicaffairs@mail.mil The Watervliet Arsenal is an Army-owned-and-operated manufacturing facility and is the oldest, continuously active arsenal in the United States, having begun operations during the War of 1812. It celebrated its 200th anniversary in July 2013. Today's arsenal is relied upon by U.S. and foreign militaries to produce the most advanced, high-tech, high-powered weaponry for cannon, howitzer, and mortar systems.