The following are events related to the Global War On Terrorism (GWOT) that took place on this day.

2003

• Operation Abalone in Iraq

2004

• An advance party of Marines from 3d Battalion, 3d Marines, from Kaneohe Bay, Hawaii, left for Afghanistan. The rest of the nearly 1,000 Marines would follow several weeks later, replacing Marines from 3d Battalion, 6th Marines, in Afghanistan in support of Operation Enduring Freedom.

Casualties on October 31:

• BRYANT, TODD JASON – October 31, 2003
• LYNCH, MATTHEW DEVIN – October 31, 2004
• BYLER, WILLIAM JUSTIN – October 31, 2005
• JACK, DERENCE WEILBACHER – October 31, 2005
• JOHNSON, ADAM ROBERT – October 31, 2005
• KADING, MATTHEW RONALD – October 31, 2005
• LIETO, WILGENE TUDELA – October 31, 2005
• MARTIN, DAVID JEFFREY – October 31, 2005
• ONETO-SIKORSKI, ROBERT CHARLES – October 31, 2005
• TESSAR, JONATHAN – October 31, 2005
• MCCLAIN, CHARLES JOHN – October 31, 2006
• OCEGUERA, ALEX – October 31, 2006
• SLOAN, DOUGLAS EMORY – October 31, 2006
• FRANCO, JASON – October 31, 2006
• WEIDEMANN, MICHAEL ROSS – October 31, 2006
• GRIESE, LOUIS ALEXANDER – October 31, 2007
• MCGOVERN, TIMOTHY IAN – October 31, 2007
• SMITHERMAN, BRANDON WILLIAM – October 31, 2007
• WALLACE, DANIEL WAYNE – October 31, 2008
• RUIZ, CESAR BOCANEGRA – October 31, 2009
• DOMION, ALEX FRANK – October 31, 2012