October 18 in Military History

The treaty ended the eight-year war but settled virtually nothing, ensuring the underlying conflicts would erupt again in the Seven Years' War just eight years later.

The Treaty of Aix-la-Chapelle concluded the War of the Austrian Succession, restoring most conquered territories to their prewar owners but leaving the strategic question of Silesia unresolved. The peace preserved the European balance of power briefly but set the stage for the Seven Years' War within a decade.

British astronomers Charles Mason and Jeremiah Dixon completed their survey of the boundary between Pennsylvania and Maryland. The Mason-Dixon Line would become the most famous geographic dividing line in American history, separating free states from slave states and eventually marking the cultural boundary between North and South that the Civil War would be fought to resolve.

The United States formally took possession of Alaska from Russia in a ceremony at Sitka, as the Russian flag was lowered and the American flag raised. The $7.2 million purchase, about two cents per acre, was mocked as "Seward's Folly" but gave the U.S. an enormous strategic position in the North Pacific. Alaska's military importance became clear during World War II, when the Japanese invaded the Aleutian Islands, and during the Cold War as a forward base against the Soviet Union.

The formal ceremony transferring Russian America to the United States took place at Sitka, with Russian troops lowering the imperial flag and American soldiers raising the Stars and Stripes. The $7.2 million purchase handed the U.S. Army responsibility for 586,000 square miles of strategic Pacific coastline and the naval approaches to the Bering Sea.

The Balkan League, Serbia, Bulgaria, Greece, and Montenegro, declared war on the Ottoman Empire, beginning the First Balkan War. The allied armies rapidly overran Ottoman territories in Europe, nearly driving Turkey out of the continent. The wars of 1912-1913 redrew the map of southeastern Europe and created the volatile conditions that led to World War I.

Adolf Hitler issued a decree establishing the Volkssturm, a national militia that conscripted all remaining German males between 16 and 60 not already in military service. The desperate measure, placing poorly armed civilians, including old men and teenage boys, in the path of advancing Allied armies, reflected the terminal nature of Germany's military position. Tens of thousands of Volkssturm members would be killed in the final months of the war.

Red Army forces of the 1st Baltic Front under General Ivan Bagramyan reached the Baltic Sea near Memel, cutting off the German Army Group North in the Courland Pocket of western Latvia. Roughly 250,000 German soldiers and their equipment would remain isolated there until the final surrender of May 1945, stripped from the Reich's defense of East Prussia.

The United States halted the systematic air interdiction campaign against North Vietnam known as Operation Linebacker I, concluding 150 days of B-52 and tactical fighter-bomber operations that had destroyed critical transportation infrastructure. The campaign demonstrated the effectiveness of laser-guided bombs and forced Hanoi back to the Paris peace talks.

West German counterterrorism unit GSG 9, assisted by two British SAS operators, stormed a hijacked Lufthansa Boeing 737 at Mogadishu Airport, Somalia, freeing all 86 hostages and killing three of the four Palestinian hijackers. The daring raid, completed in seven minutes, demonstrated the effectiveness of elite counterterrorism forces and became a model for hostage rescue operations worldwide.