U.S. Military personnel stationed in Baghdad, Iraq held a Memorial Day service Monday to honor the three U.S. Army soldiers who were killed in a drone attack in Jordan earlier this year. 

Combined Joint Task Force Operation Inherent Resolve presented the ceremonial wreath at the Memorial Day ceremony at the Union III base, in Baghdad's Green Zone. Those in attendance paid their respects to the fallen service members. 

U.S. Army Maj. Gen. J.B. Vowell, Combined Joint Task Force - Operation Inherent Resolve Commanding General, writes the name of a fallen service member on the Memorial Day wall during a ceremony at Union III in Baghdad, Iraq, May 27, 2024. 

U.S. Army Maj. Gen. J.B. Vowell, Combined Joint Task Force - Operation Inherent Resolve Commanding General, writes the name of a fallen service member on the Memorial Day wall during a ceremony at Union III in Baghdad, Iraq, May 27, 2024.  (U.S. Army)

Staff Sgt. William Rivers, 46, Sgt. Kennedy Sanders, 24, and Sgt. Breonna Moffett, 23, were killed Jan. 28 after a drone attack by an Iranian proxy group hit Tower 22, a small U.S. outpost in northeast Jordan, on the Iraq, Syria, Jordan tri-border, where they were stationed. 

BIDEN ADMIN REVERSES COURSE, GRANTS PERMIT FOR CATHOLIC GROUP'S MEMORIAL DAY MASS AT NATIONAL CEMETERY

us soldiers killed in jordan

L-R: Sgt. William Rivers, Spc. Breonna Moffett, and Spc. Kennedy Sanders.  (Fox News )

The soldiers had been stationed at Tower 22 just across the border from Syria to support the mission to defeat ISIS. 

At its height, over 100,000 people lived there, blocked by Jordan from entering into the kingdom at a time when concerns about infiltration by the extremist group were rampant. Those concerns grew out of a 2016 car bomb attack there, that killed seven Jordanian border guards.

Operation Inherent Resolve soldiers stand in formation and salute the United States flag during a Memorial Day ceremony at Union III in Baghdad, Iraq, May 27, 2024.

Operation Inherent Resolve soldiers stand in formation and salute the United States flag during a Memorial Day ceremony at Union III in Baghdad, Iraq, May 27, 2024. (U.S. Army)

The camp has dwindled in the time since to some 7,500 people because of a lack of supplies, per United Nations estimates.

The Memorial Day Wall at Union III in Baghdad, Iraq, May 27, 2024. 

The Memorial Day Wall at Union III in Baghdad, Iraq, May 27, 2024.  (U.S. Army)

The base began as a Jordanian border observation outpost, then saw an increased U.S. presence after American forces entered Syria in late 2015. The small installation includes U.S. engineering, aviation, logistics and security troops with about 350 U.S. Army and Air Force personnel deployed there.

A U.S Army soldier assigned to 1st Battalion, 181st Infantry Regiment, 44th Infantry Brigade Combat Team, New Jersey National Guard, plays Amazing Grace on bagpipes during the Memorial Day ceremony at Union III in Baghdad, Iraq, May 27, 2024.

A U.S Army soldier assigned to 1st Battalion, 181st Infantry Regiment, 44th Infantry Brigade Combat Team, New Jersey National Guard, plays Amazing Grace on bagpipes during the Memorial Day ceremony at Union III in Baghdad, Iraq, May 27, 2024. (U.S. Army)

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Rivers, Sanders and Moffett were all assigned to the 718th Engineer Company, an Army Reserve unit based in Fort Moore, Georgia, previously known as Fort Benning.

The Associated Press contributed to this report.