Courtesy photo Marine Sgt. David J. Smith

Smith was 25.

After being flown to Kandahar, Afghanistan, for treatment, Smith was flown to the Landstuhl Regional Medical Center in Landstuhl, Germany, and was declared brain dead, but was kept on life support until his parents, who work on Fort Detrick, arrived at the hospital.

‘‘He was a great Marine, a great American and a great friend,” said Cpl. Alex Crane of Middletown, who served with Smith in Co. B.

There will be a viewing Monday at the Frederick Christian Fellowship Church Complex, formerly the Lynfield Event Complex, from noon to 9 p.m.

On Tuesday the funeral will be held at 9 a.m., at the Frederick Christian Fellowship Church Complex, and Smith will be buried at Arlington National Cemetery starting at 3 p.m.

Company B drills out of the Pfc. Flair U.S. Army Reserve Center in Frederick, one of Fort Detrick’s mission partners, and deployed in November 2009 in support of Operation Enduring Freedom to the Helmand province with the 4th LAR.

The 4th LAR is the first Marine reserve battalion to deploy to Afghanistan in support of Operation Enduring Freedom.

Company B is one of only four light armored reconnaissance companies in the U.S. Marine Corps Reserve, and was assigned to Fort Detrick in October 1987.

Hemland province borders Pakistan and has become a focus of the surge of U.S. troops as it is one of the most unstable regions in Afghanistan.

Smith, a light armored vehicle crewman, graduated from Frederick High School in 2002 and joined the Marines in Dec. 2003. During his time in the Marine Corps he deployed to Iraq in 2006 and earned several awards, including the Combat Action Ribbon.

Two other members of Co. B were also killed in the attack, Lance Cpl. Jeremy Kane, 22, of Cherry Hill, N.J., and U.S. Navy Petty Officer 2nd Class Xin Qi, a U.S. Navy Hospital Corpsman attached to Co. B., 25, of Cordova, Tenn.