On September 7, 1776, during the Revolutionary War, the American submersible craft Turtle attempts to attach a time bomb to the hull of British Admiral Richard Howe’s flagship Eagle in New York Harbor. It was the first use of a submarine in warfare.

In preparation for his march to the sea, Union General William T. Sherman orders residents of Atlanta, Georgia, to evacuate the city.

French poet Guillaume Apollinaire is arrested and jailed on suspicion of stealing Leonardo da Vinci’s Mona Lisa from the Louvre museum in Paris.

On September 7, 1940, 300 German bombers raid London, in the first of 57 consecutive nights of bombing. This bombing “blitzkrieg” (lightning war) would continue until May 1941.

In Washington, President Jimmy Carter and Panamanian dictator Omar Torrijos sign a treaty agreeing to transfer control of the Panama Canal from the United States to Panama at the end of the 20th century. The Panama Canal Treaty also authorized the immediate abolishment of the Canal Zone, a 10-mile-wide, 40-mile-long U.S.-controlled area that bisected the Republic of Panama. Many in Congress opposed giving up control of the Panama Canal—an enduring symbol of U.S. power and technological prowess—but America’s colonial-type administration of the strategic waterway had long irritated Panamanians and other Latin Americans.