324 - Battle of Adrianople: Roman Emperor Constantine I defeats his co-emperor Licinius, who flees to Byzantium
1187 - Battle of Horns of Hattin: Saladin, Sultan of Egypt and Syria, destroys Jerusalem’s crusader army
1863 - Battle of Gettysburg, largest battle ever fought on the American continent, ends in a major victory for the Union during the US Civil War
1884 - Dow Jones publishes its 1st stock …
