Patrick Williamson was born on August 13, 1985, in Lafayette, Louisiana. After attending the University of Louisiana at Lafayette for two years, he enlisted in the U.S. Army on August 3, 2006. He completed Basic Training and Advanced Individual Training as an Infantryman at Fort Benning, Georgia, in November 2006, and Airborne Training at Fort Benning in December 2006. PFC Williamson next served with Charlie Company, 1st Battalion, 17th Infantry Regiment of the 2nd Infantry Division at Fort Lewis, Washington, as an Infantryman and with the 5th Stryker Combat Team from January 2007 to July 2009, and then deployed with his unit to Afghanistan from July 2009 until he was killed in action on October 27, 2009. Sgt Williamson was buried at the Sacred Heart Mausoleum in Broussard, Louisiana, and also has a marker at Arlington National Cemetery along with the 7 other Army soldiers he was killed with.

His Bronze Star Medal Citation reads:

For meritorious service from 21 July 2009 to 27 October 2009, while assigned to Company C, 1st Battalion, 17th Infantry Regiment, 2d Infantry Division, during Operation Enduring Freedom. Sergeant Williamson's commitment contributed to our Nation's continual war on terrorism and his actions represented his dedication to the security of the United States of America. His sincere desire to bring peace and stability to a foreign nation is an example of what all American Soldiers strive to achieve. No greater honor can be demonstrated by his ultimate sacrifice, and he will be forever remembered for his actions. Sergeant Williamson's duty performance and selfless service are in keeping with the highest traditions of military service and reflect great credit upon him, the United States Forces - Afghanistan, and the United States Army.