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

2004

• Start of Operation Powder River in Iraq
• Start of Operation Triple Play in Iraq

2010

• End of Operation Dragon Strike in Afghanistan

2014

• End of Operation Slipper in Afghanistan

Casualties on December 31:

• SMITH, JASON EDWARD – December 31, 2004
• CORNIEL, MARCELINO RONALD – December 31, 2005
• BLOHM, ALAN ROBERT – December 31, 2006
• GRANT, SANDRA STEPHANIE – December 31, 2006
• SCHILLER, JONATHAN ERIC – December 31, 2006
• SMITH, RICHARD ANTHONY – December 31, 2006
• GORHAM, BRIAN LEE – December 31, 2007
• LACERNA, RENO SABADO – December 31, 2007
• LOTTER, CHRISTOPHER WARREN – December 31, 2008
• TOLLEFSON, BENJAMIN BRYAN – December 31, 2008
• PHILLIPS, ANTON RAMESH – December 31, 2009
• BECKERMAN, MICHAEL JOE – December 31, 2010
• HERRERA, PERNELL JOHNNIE – December 31, 2011