October 9

Operation Pawan was the Indian Peace Keeping Force’s major combat campaign to seize control of the Jaffna Peninsula and disarm the Liberation Tigers of Tamil Eelam (LTTE) after the Indo–Sri Lanka Accord. Indian forces moved into northern Sri Lanka in July–October 1987; the named Jaffna offensive most sources date to October 1987. The campaign began as a peace‑enforcement mission and quickly became prolonged urban and counter‑insurgency warfare with heavy costs for soldiers and civilians and lasting political consequences in both countries.

On October 26, 1942, carrier airpower collided in the waters near the Santa Cruz Islands, east of Guadalcanal, as U.S. and Japanese fleets fought to control sea lanes and the fate of Henderson Field; tactically the Japanese sank USS Hornet and damaged USS Enterprise, but the clash cost Japan irreplaceable veteran aviators and shifted the strategic balance in the Pacific.

On October 14, 1913, an underground explosion at the Universal Colliery in Senghenydd, South Wales, ripped through the mine and the village that depended on it. An initial ignition of firedamp—methane—spread as flame through fine coal dust, triggering a catastrophic series of blasts that killed 439 men and boys. Rescue teams fought toxic afterdamp and further explosions; a Board of Trade inquiry later blamed firedamp ignited and propagated by coal dust and criticized dust-control and operating practices. The disaster remains Britain’s worst mining accident and a turning point in debates over mine safety.