1526: Battle of Mohács: In a decisive battle, the Kingdom of Hungary is conquered by the Ottoman Empire led by Suleiman the Magnificent

1825: Portugal recognizes the independence of its former colony Brazil

1842: United Kingdom and China sign the Treaty of Nanking, ending the First Opium War

1862: Second Battle of Bull Run begins in Manassas, Virginia, leading to a Confederate victory in the US Civil War

1949: Soviet Union secretly performs its first successful nuclear weapons test at the Semipalatinsk Test Site in northeast Kazakhstan

2005: Hurricane Katrina makes its second and third landfalls as a Category 3 hurricane, devastating much of the Gulf Coast from Louisiana to the Florida Panhandle, killing more than 1,836 people and causing over $115 billion in damage

Source: Onthisday.com