What happend on 15th June

14.06
16.06
1804

New Hampshire approves the Twelfth Amendment to the United States Constitution, ratifying the document.

1785

Jean-François Pilâtre de Rozier, co-pilot of the first-ever manned flight (1783), and his companion, Pierre Romain, become the first-ever casualties of an air crash when their hot air balloon explodes during their attempt to cross the English Channel.

1776

Delaware Separation Day

1775

American Revolutionary War: George Washington is appointed commander-in-chief of the Continental Army.

1752

Benjamin Franklin proves that lightning is electricity.

1667

The first human blood transfusion is administered by Dr. Jean Baptiste. He transfuses 12 fluid ounces (350 ml) of sheep blood to a 15-year-old boy. The boy later dies and Baptiste is accused of murder.

1520

Pope Leo X threatens to excommunicate Martin Luther.

1409

Western Schism: The Catholic church is led into a double schism as Petros Philargos is elected Pope Alexander V by the Council of Pisa, joining Pope Gregory XII in Rome and Pope Benedict XII in Avignon.

1389

Battle of Kosovo: The Ottoman Empire defeats Serbs and Bosnians.

1246

With the death of Duke Frederick II, the Babenberg dynasty ends in Austria.