September 6

A powerful Atlantic hurricane struck Puerto Rico on September 13, 1928 — Saint Philip’s Day — and then carved a path through the Bahamas to make landfall on Florida’s east coast on September 16–17, 1928. The storm wrecked crops, towns, and lives, but its deadliest legacy was the flood from Lake Okeechobee that overwhelmed low-lying settlements and killed thousands. The catastrophe exposed weaknesses in warning systems, racial and economic inequalities in relief, and ultimately drove federal flood-control work that reshaped the lake decades later.

The September 11 attacks, commonly referred to as 9/11, were a series of coordinated terrorist events executed by al-Qaeda on September 11, 2001. These attacks targeted the World Trade Center in New York City, the Pentagon in Arlington, Virginia, and a thwarted attempt which ended in a field near Shanksville, Pennsylvania. Nearly 3,000 lives were lost, and the repercussions reshaped global security and foreign policy.

On the morning of September 25, 1915, French Fourth and Fifth Armies launched a major offensive across the Champagne plain against German 3rd and 4th Armies. Intended as a coordinated autumn push alongside operations in Artois, the attack produced local penetrations but no strategic breakthrough. Over weeks of grinding assaults, artillery duels and counterattacks, the campaign inflicted heavy casualties on both sides and helped reshape artillery and infantry tactics in the years that followed.