The bombing of Black Wall Street was the worst terrorist attack in US history, and it took place in Tulsa, Oklahoma. In 1921, a white mob set fire to the area's businesses and homes, killing hundreds of African Americans. The event is considered one of America's first acts of domestic terrorism.
In the early 1900s, Tulsa was known as "the oil capital of the world." Many people flocked to Tulsa to work in the oil industry or as service providers for those who did. Most of these new residents were African American.
But Tulsa's population was segregated by race. In 1917, an ordinance was passed that prevented blacks from living on Cherokee land (which surrounded the city). The ordinance also made it illegal for blacks to live in any other areas where whites were already living or planned on moving into. Over time, this meant that most black people were forced out of downtown Tulsa—and into Black Wall Street.
In 1921, a group called "The American Legion" began protesting against Black Wall Street because they believed that blacks should not live in such a nice area (even though they had no other options). They also accused some businesses there of selling illegal alcohol—which wasn't true at all!