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

2003

• Muhammad Hamza Zubaydi is captured. He is the Queen of Spades in the Iraq’s Most Wanted Deck of Playing Cards.

2006

• Operation Lions Pride in Afghanistan

2007

• Operation Commando Dive in Iraq
• Operation Eagle Dive I in Iraq
• Operation Polar Dive in Iraq
• Operation Trident IV in Iraq

2008

• Marines from 2d Battalion, 2d Marines, began deploying from Camp Lejeune to Iraq’s Al Anbar Province in support of Operation Iraqi Freedom.

Casualties on April 21:

• GUY, ROBERT ALLEN – April 21, 2005
• ADAMKAVICIUS, CLAYTON LEE – April 21, 2006
• BEVEL, RAY MICHAEL – April 21, 2007
• BUSHNELL, WILLIAM WADE – April 21, 2007
• HARPER, MARLON BRIAN – April 21, 2007
• NORTH, CHRISTOPHER MARK – April 21, 2007
• SLATER, MICHAEL JASON – April 21, 2007
• TUDOR, STEVEN RICHARD – April 21, 2007
• CAMPOS, ADRIAN MONTOYA – April 21, 2008
• CHRISTOFFERSON, STEVEN JOHN – April 21, 2008
• KOHLHAAS, ADAM JOB – April 21, 2008
• VANDEGRIFT, MATTHEW RYAN – April 21, 2008