This Day in History: 0000-05-14

14 May to 19 Jun – Soldiers of the First Crusade and Byzantium besieged and captured the Turkish citadel at Nicaea (1097).
14 May – The Protestant Union, a coalition of German states including Anhalt, Ansbach, Baden-Durlach, Bayreuth, Brandenburg, Hesse-Kassel, Neuburg, Nuremburg, Palatinate, Strassbourg, Ulm and Wurttenberg, was founded to guard protestants and their interests (1608).
14 May – British physician Edward Jenner administered the first vaccine (cowpox) found to be effective against smallpox (1796).
14 May – The Lewis and Clark Expedition to explore the Louisiana Territory left St Louis, MO, under Captain Meriwether Lewis and his close friend Second Lieutenant William Clark (1804).
14 May – Lina Medina, the youngest mother in history at age five years, seven months and 17 days, gave birth to Gerardo Medina by caesarean section (1939). The biological father is unknown.