This Day in History: 0000-01-21

21 Jan – The Anabaptist movement began in Switzerland when Conrad Grebel, Felix Manz, George Blaurock, and several others baptized each other in Zurich. This state-independent “believer’s baptism” was inconsistent with the state sponsored and Catholic infant baptism, breaking a 1,000 year old tradition (1525).
21 Jan – First medical pamphlet in America, covering smallpox, was published (1677).
21 Jan – The National Assembly of Quebec adopted and flew the Quebec flag for the first time, inaugurating the Quebec Flag Day (1948).
21 Jan – The first nuclear powered submarine, the USS Nautilus (SSN 571), was launched at Groton, CT (1954).
21 Jan to 9 Jul – The Battle of Khe Sanh, in which approximately 26,000 US soldiers and Marines defended the Khe Sanh combat base against about 34,000 North Vietnamese troops. Both sides claimed victory. The NVA sustained far heavier losses but the US abandoned the base in late July, giving the NVA control over the territory (1968).
21 Jan – The US Coast Guard intercepted a ship with over 9500 lbs of cocaine on board, one of the largest drug busts in history (1999).