| 97651 | August 28 | Event | 1524 – The Kaqchikel Maya rebel against their former Spanish allies during the Spanish conquest of Guatemala. |
| 97652 | August 28 | Event | 1542 – Turkish–Portuguese War (1538–57): Battle of Wofla: The Portuguese are scattered, their leader Christovão da Gama is captured and later executed. |
| 97653 | August 28 | Event | 1565 – Pedro Menéndez de Avilés sights land near St. Augustine, Florida and founds the oldest continuously occupied European-established city in the continental United States. |
| 97654 | August 28 | Event | 1609 – Henry Hudson discovers Delaware Bay. |
| 97655 | August 28 | Event | 1619 – Election of Ferdinand II, Holy Roman Emperor. |
| 97656 | August 28 | Event | 1640 – Second Bishop's War: King Charles I's English army loses to a Scottish Covenanter force at the Battle of Newburn. |
| 97657 | August 28 | Event | 1648 – Siege of Colchester ended when Royalists Forces surrender to the Parliamentary Forces after eleven weeks, during the English Civil War. |
| 97658 | August 28 | Event | 1709 – Meidingnu Pamheiba is crowned King of Manipur. |
| 97659 | August 28 | Event | 1789 – William Herschel discovers a new moon of Saturn: Enceladus. |
| 97660 | August 28 | Event | 1810 – Battle of Grand Port: The French accept the surrender of a British Navy fleet. |
| 97661 | August 28 | Event | 1830 – The Baltimore and Ohio Railroad's new Tom Thumb steam locomotive races a horse-drawn car, presaging steam's role in US railroads. |
| 97662 | August 28 | Event | 1833 – The Slavery Abolition Act 1833 receives Royal Assent, abolishing slavery through most of the British Empire. |
| 97663 | August 28 | Event | 1845 – The first issue of Scientific American magazine is published. |
| 97664 | August 28 | Event | 1849 – After a month-long siege, Venice, which had declared itself independent as the Republic of San Marco, surrenders to Austria. |
| 97665 | August 28 | Event | 1859 – The Carrington event disrupts electrical telegraph services and causes aurora to shine so brightly that they are seen clearly over the Earth's middle latitudes. |
| 97666 | August 28 | Event | 1861 – American Civil War: Union forces attack Cape Hatteras, North Carolina in the Battle of Hatteras Inlet Batteries which lasts for two days. |
| 97667 | August 28 | Event | 1862 – American Civil War: Second Battle of Bull Run, also known as the Battle of Second Manassas. The battle ends on August 30. |
| 97668 | August 28 | Event | 1867 – The United States takes possession of the (at this point unoccupied) Midway Atoll. |
| 97669 | August 28 | Event | 1879 – Cetshwayo, last king of the Zulus, is captured by the British. |
| 97670 | August 28 | Event | 1898 – Caleb Bradham invents the carbonated soft drink that will later be called "Pepsi-Cola". |
| 97671 | August 28 | Event | 1901 – Silliman University is founded in the Philippines. The first American private school in the country. |
| 97672 | August 28 | Event | 1909 – A group of mid-level Greek Army officers launches the Goudi coup, seeking wide-ranging reforms. |
| 97673 | August 28 | Event | 1913 – Queen Wilhelmina opens the Peace Palace in The Hague. |
| 97674 | August 28 | Event | 1914 – World War I: The Royal Navy defeats the German fleet in the Battle of Heligoland Bight. |
| 97675 | August 28 | Event | 1914 – World War I: German troops take the city of Namur in Belgium. |
| 97676 | August 28 | Event | 1916 – World War I: Germany declares war on Romania. |
| 97677 | August 28 | Event | 1916 – World War I: Italy declares war on Germany. |
| 97678 | August 28 | Event | 1917 – Ten Suffragettes are arrested while picketing the White House. |
| 97679 | August 28 | Event | 1924 – The Georgian opposition stages the August Uprising against the Soviet Union. |
| 97680 | August 28 | Event | 1931 – France and the Soviet Union sign a treaty of non-aggression. |