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I found entering the date and selecting Go – I got plenty of dates – quite a few choices for each day – I put down a few
June 14 1645 Oliver Cromwell‘s army routs the king's army at Naseby or
June 19 1778 General George Washington‘s troops finally leave Valley Forge after a winter of training. or 1821 The Ottomans defeat the Greeks at the Battle of Dragasani.
June 20 451 Roman and barbarian warriors halt Attila‘s army at the Catalaunian Plains in eastern France.
June 21 1887 Britain celebrates the golden jubilee of Queen Victoria.
June 22 1807 British seamen board the USS Chesapeake, a provocation leading to the War of 1812
June 23 1700 Russia gives up its Black Sea fleet as part of a truce with the Ottoman Empire.
June 24 217 BC Carthaginian forces led by Hannibal destroy a Roman army under consul Gaius Flaminius in a battle at Lake Trasimene in central Italy. Or 1314 Scottish forces, led by Robert the Bruce, win an overwhelming victory against English King Edward II at the Battle of Bannockburn.
June 26 1804 The Lewis and Clark Expedition reaches the mouth of the Kansas River after completing a westward trek of nearly 400 river miles.
June 27 1905 The crew of the Russian battleship Potemkin mutinies. Or 1918 Two German pilots are saved by parachutes for the first time.
June 28 1778 Mary "Molly Pitcher" Hays McCauley, wife of an American artilleryman, carries water to the soldiers during the Battle of Monmouth.
June 29 1967 Israel removes barricades, re-unifying Jerusalem.
June 30 1520 Montezuma II is murdered as Spanish conquistadors flee the Aztec capital of Tenochtitlan during the night.