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

2002

• The Marine Corps formed a new 86-man commando unit. The Marine Corps Special Operations Command Detachment has no official nickname as of yet and consists of volunteers. It has a 22-man headquarters, 30 reconnaissance Marines, 28 intelligence specialists, and a 6-person team to provide firepower. The unit will begin training in June 2003 and be ready for deployments by April 2004.

2003

• Operation Devil Siphon in Iraq
• Operation Overcoat in Iraq
• Operation Salm in Iraq
• Operation Santa Strike in Iraq

2004

• End of Operation Phantom Fury in Iraq

2006

• Operation Gladiator in Iraq
• End of Battle of Fallujah (2006) in Iraq

Casualties on December 23:

• PERREAULT, THEODORE LOUIS – December 23, 2003
• BATES, TODD MICHAEL – December 23, 2003
• BARNETT, CHRISTOPHER WILLIAM – December 23, 2004
• HILLENBURG, ERIC DEAN – December 23, 2004
• PHILLIPS, JAMES RONALD – December 23, 2004
• SMITH, RALEIGH CLINTON – December 23, 2004
• REALI, REGINA CHRISTINA – December 23, 2005
• WILLEY, CHEYENNE CHRISTOPHER – December 23, 2005
• ALGRIM, WILSON ANDREW – December 23, 2006
• BARTA, JOHN PAUL – December 23, 2006
• CRUTCHFIELD, MICHAEL JACOB – December 23, 2006
• ELIAS, ELIAS GEORGE – December 23, 2006
• MEJIA, BOBBY II – December 23, 2006
• NORRIS, CURTIS LEE – December 23, 2006
• VOLLMER, CHAD JOSEPH – December 23, 2006
• ALEXANDER, JOSEPH – December 23, 2010
• VASSELIAN, DANIEL MARK – December 23, 2013
• GOBLE, MICHAEL JAMES – December 23, 2019