17 BC Emperor Augustus celebrates the Ludi Saeculares, commemorating Rome's 700th anniversary, belatedly by 36-years

47 Emperor Claudius celebrates the Ludi Saeculares, commemorating Rome's 800th anniversary, reverting to the original chronology

88 Emperor Domitian celebrates the Ludi Saeculares, commemorating Rome's 900th anniversary (out of sync with any other calculation)

148 Emperor Antoninus Pius celebrates the Ludi Saeculares, commemorating Rome's 900th anniversary, using the original chronology

204 The Emperor Septimius Severus celebrates the Ludi Saeculares, commemorating Rome's 900th anniversary (out of sync with any other calculation)

248 The Emperor Philip the Arabian celebrates the Ludi Saeculares, commemorating Rome's 1000th anniversary, using the original chronology - last observance of the festival

542 Battle of Badon: Arthur vs. Mordred

1035 Baldwin V becomes Count of Flanders (1035-1067)

1213 The Battle of Damme: The English begin a two-day raid in the Zwyn Estuary in Flanders, burning French ships

1434 Battle of Lapin: Hussite Ultras defeated by Borek of Miletinek

1522 A popular uprising expels the French from Genoa

1559 Battle of Konia: Prince Selim of Turkey defeats his half-brother Bayazid

1574 Henry III succeeds to the throne of France

1588 The Spanish Armada sails from Lisbon for the Netherlands

1635 Treaty of Prague: an unsuccessful effort at ending the Thirty Years War.

1808 Napoleon annexes Tuscany to his empire

1814 First Treaty of Paris ending the Napoleonic Wars, following Bonaparte's first abdication

1814 US gunboats capture 3 British ones on Lake Ontario

1822 Denmark Vesey's slave conspiracy in Charelston is betrayed, 37 blacks slain

1841 The French capture Mascara, Morocco

1842 Assassination attempt on Queen Victoria

1848 Battle of Goito: Piedmontese defeat the Austrians

1849 Battle of Palestro: Austrians defeat Sardinians by the 31st

1849 Battle of San Pancrazio: Garibaldi defeats the French near Rome

1854 Battle of Cienquilla: Apaches ambush the 1st Dragoons, 22 die.

1861 CS Post Office Department set up, as US PO ceases deliveries in the South

1864 Battle of Bethesda Church, Va.

1867 Frédéric Passy & Henri Dunant form the 'Ligue Internationale et Permanente de la Paix', at Geneva.

1868 The first "Decoration Day", designated by GAR Commander-in-Chief Maj Gen John Logan

1913 Treaty of London: Ends the First Balkan War, with massive Turkish territorial losses in Europe

1916 Battle of Jutland: Grand Fleet sails, 37 battleships & 120 other ships

1937 Chicago police fire on union marchers at Republic Steel, 10 die

1941 The Luftwaffe bombs Dublin.

1941 Greek patriots Manolis Glezos and Apostolos Santas climbed on the Acropolis and tear down the Swastika flag that had been placed there by the occupying Germans nearly a month earlier

1942 Diego Suarez: Japanese mini-sub torpedoes British BB 'Ramilles' & a tanker

1942 First Allied air raid on Cologne

1943 US troops complete recapture of Attu

1958 Unknown soldiers of WWII & Korean War are entombed in Arlington National Cemetery

1962 Premiere of Sir Benjamin Britten's "War Requiem", London

1962 The USS 'Arizona' Memorial dedicated in Pearl Harbor

1966 300 US airplanes bomb North Vietnam

1967 Biafra secedes from Nigeria, initiating a bloody three-year civil war

1972 Japanese terrorists kill 24, wound 72 at Tel Aviv's Lod Airport

1982 Spain becomes the 16th member of NATO

2012 Mass shooting at a coffee shop in Seattle, 5 die