August 28 is the 240th day of the year (241st in leap years) in the Gregorian calendar; 125 days remain until the end of the year.
663 - Silla-Tang armies crush the Baekje restoration attempt and force Yamato Japan to withdraw from Korea in the Battle of Baekgang.
1189 - Third Crusade: The Crusaders begin the Siege of Acre under Guy of Lusignan.
1521 - Ottoman wars in Europe: The Ottoman Turks occupy Belgrade.
1565 - Pedro Menendez de Aviles sights land near St. Augustine, Florida and founds the oldest continuously occupied European-established city in the continental United States.
1609 - Henry Hudson discovers Delaware Bay.
1619 - Election of Ferdinand II, Holy Roman Emperor.
1640 - Second Bishop's War: King Charles I's English army loses to a Scottish Covenanter force at the Battle of Newburn.
1648 - Second English Civil War: The Siege of Colchester ends when Royalists Forces surrender to the Parliamentary Forces after eleven weeks, during the Second English Civil War.
1789 - William Herschel discovers a new moon of Saturn: Enceladus.
1810 - Napoleonic Wars: The French Navy accepts the surrender of a British Royal Navy fleet at the Battle of Grand Port.
1830 - The Baltimore and Ohio Railroad's new Tom Thumb steam locomotive races a horsedrawn car, presaging steam's role in U.S. railroads.
1845 - The first issue of Scientific American magazine is published.
1849 - Revolutions of 1848 in the Austrian Empire: After a monthlong siege, Venice, which had declared itself independent as the Republic of San Marco, surrenders to Austria.
1859 - The Carrington event is the strongest geomagnetic storm on record to strike the Earth.
Electrical telegraph service is widely disrupted.
1861 - American Civil War: Union forces attack Cape Hatteras, North Carolina in the Battle of Hatteras Inlet Batteries which lasts for two days.
1862 - American Civil War: The Second Battle of Bull Run, also known as the Battle of Second Manassas, begins in Virginia. The battle ends on August 30 with another Union defeat.
1867 - The United States takes possession of the (at this point unoccupied) Midway Atoll.
1898 - Caleb Bradham's beverage 'Brad's Drink' is renamed 'Pepsi-Cola'.
1909 - A group of mid-level Greek Army officers launches the Goudi coup, seeking wide-ranging reforms.
1913 - Queen Wilhelmina opens the Peace Palace in The Hague.
1914 - World War I: The Royal Navy defeats the German fleet in the Battle of Heligoland Bight.
1916 - World War I: Germany declares war on Romania.
1916 - World War I: Italy declares war on Germany.
1917 - Ten suffragists, members of the Silent Sentinels, are arrested while picketing the White House in favor of women's suffrage in the United States.
1921 - Russian Civil War: The Red Army dissolved the Makhnovshchina, after driving the Revolutionary Insurgent Army out of Ukraine.
1924 - The Georgian opposition stages the August Uprising against the Soviet Union.
1936 - Nazi Germany begins its mass arrests of Jehovah's Witnesses, who are interned in concentration camps.[3] 1937 - Toyota Motors becomes an independent company.
1943 - Denmark in World War II: German authorities demand that Danish authorities crack down on acts of resistance. The next day, martial law is imposed on Denmark.
1944 _ World War II: Marseille and Toulon are liberated.
1946 - The Workers’ Party of North Korea, predecessor of the ruling Workers’ Party of Korea, is founded at a congress held in Pyongyang, North Korea 1955 - Black teenager Emmett Till is lynched in Mississippi for whistling at a white woman, galvanizing the nascent civil rights movement.
1957 - U.S. Senator Strom Thurmond begins a filibuster to prevent the United States Senate from voting on the Civil Rights Act of 1957; he stopped speaking 24 hours and 18 minutes later, the longest filibuster ever conducted by a single Senator.
1963 - March on Washington for Jobs and Freedom: Rev. Dr. Martin Luther King Jr. gives his I Have a Dream speech..
1964 - The Philadelphia race riot begins.
1968 - Police and protesters clash during 1968 Democratic National Convention protests as protesters chant 'The whole world is watching' 1990 - Gulf War: Iraq declares Kuwait to be its newest province.
1990 - An F5 tornado strikes the Illinois cities