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

2001

• Congress passes Public Law 107–40, a joint resolution authorizing President
  Bush to launch military strikes against terrorists responsible for the
  11 September attacks.

2004

• Operation Hurricane II in Iraq

2005

• End of Battle of Tal Afar in Iraq

Casualties on September 18:

• ARRIAGA, RICHARD STEVE – September 18, 2003
• FAUNCE, BRIAN RICHARD – September 18, 2003
• THOMPSON, ANTHONY ORLANDO – September 18, 2003
• WRIGHT, JAMES CHRISTOPHER – September 18, 2003
• PRICE, JAMES WILLIAM – September 18, 2004
• ROSENBAUM, THOMAS CHAD – September 18, 2004
• NELOM, REGILIO ERIC – September 18, 2005
• WORSTER, JAMES ROBERT – September 18, 2006
• EMERSON, MATTHEW J – September 18, 2007
• LANDRY, JOSEPH NED III – September 18, 2007
• OLSON, NICHOLAS PAUL – September 18, 2007
• VALENTINE, DONALD EUGENE III – September 18, 2007
• WALKER, AARON JAMES – September 18, 2007
• FARLEY, BRANDON WADE – September 18, 2008
• WILEY, JAMES LEON JR – September 18, 2008
• CARRON, PAUL DOUGLAS – September 18, 2010
• GRIDER, RONALD AARON – September 18, 2010
• HARTON, JOSHUA ALEXANDER – September 18, 2010
• VIEYRA, BARBARA – September 18, 2010
• YATES, ERIC DAVID – September 18, 2010
• CLARK, CHAZRAY CLEA-ANTOINE – September 18, 2011
• COOK, RYAN JAMES – September 18, 2011
• SAYNE, TIMOTHY DOUGLAS – September 18, 2011
• ALTAMIRANO, ESTEVAN – September 18, 2011