Direct proof of use
The M198 155 mm howitzer is directly documented in U.S. service during the 2001 War in Afghanistan. A Defense Department photo caption identifies Fox Battery, 7th Field Artillery soldiers firing a 155 mm M198 near Khowst, Afghanistan, on 9 January 2005 during artillery training intended to maintain destructive, suppressive, and protective field-artillery fires.
DVIDS separately published a 1 February 2005 story from Forward Operating Base Salerno describing Battery F, 7th Field Artillery Regiment firing an M198 155 mm howitzer during a 29 January show-of-force exercise. The story ties the firing to local fire-support synchronization, base-defense context, and support to soldiers and Marines on patrol.
Sources: DOW Fox Battery M198 Khowst, DVIDS Artillery Battery Shows Force
Timeline
The public record shows M198 use and fielding in Afghanistan across several years rather than a single isolated event. The earliest dated item used here is a January 2005 Defense Department caption from near Khowst, followed by the FOB Salerno show-of-force exercise later that month.
In August 2009, U.S. Air Force reporting documented an Army and Air Force team air-dropping an M198 artillery piece from a C-130 to an Army unit in remote eastern Afghanistan. DVIDS imagery from October 2009 then documented soldiers firing an M198 at Forward Operating Base Mehtar Lam in Laghman Province to support forward maneuvering elements.
Sources: DOW Fox Battery M198 Khowst, DVIDS Artillery Battery Shows Force, Air Force M198 Airdrop, DVIDS M198 Mehtar Lam
Operational role
In the sourced Afghanistan record, the M198 appears as a U.S. heavy indirect-fire system within the United States, NATO, and Afghan government side of the war. The documented operators are U.S. Army artillery personnel, including Fox Battery or Battery F, 7th Field Artillery Regiment, and the documented tasks are firing, show-of-force, fire-support readiness, and delivery to a remote forward operating base.
The sources separate firing from movement and fielding. The 2005 and 2009 firing records show M198 guns being used from established forward bases, while the Air Force report documents delivery of the weapon to eastern Afghanistan so the receiving Army unit could add heavier artillery support in Paktika Province.
Sources: DOW Fox Battery M198 Khowst, DVIDS Artillery Battery Shows Force, Air Force M198 Airdrop, DVIDS M198 Mehtar Lam