Direct proof of use
Army University Press documents M18A1 Claymore use in the 2001 War in Afghanistan through its Combat Studies Institute history of the July 2008 Battle of Wanat. The account says U.S. paratroopers at OP Topside emplaced four M18A1 command-detonated antipersonnel mines around exposed dead ground east and north of the observation post.
The documented user was Chosen Company, 2d Battalion, 503d Infantry, 173d Airborne Brigade Combat Team. The Claymores were part of a defensive package around OP Topside, a small position tied to COP Kahler in Nuristan Province, where close terrain and a tree-filled ravine created dangerous avenues of approach.
Sources: Wanat Combat Action In Afghanistan
Timeline
The Wanat account places the OP Topside Claymores in the days before the July 13, 2008 attack. By July 12, the observation post had become a set of interconnected fighting positions, and the paratroopers used concertina wire, sandbags, crew-served weapons, hand grenades, and the M18A1 mines to improve the exposed position.
During the July 13 battle, OP Topside became one of the most vulnerable points in the American defense. The same source describes enemy fire and close assault pressure around the post, followed by reinforcement from COP Kahler and attack-helicopter fire into nearby dead ground.
Sources: Wanat Combat Action In Afghanistan
Narrative
In this documented Afghanistan use, the M18A1 was not a scattered or victim-activated minefield. The Army account identifies the mines as command-detonated Claymores operated by U.S. soldiers and describes a nightly routine in which they were positioned after dark, checked, and recovered at first light.
The source ties their purpose to close-threat protection at OP Topside. The observation post sat near dead ground, agricultural terraces, trees, brush, and a ravine that limited observation and fields of fire. The M18A1s were used with other defensive weapons to cover approaches that insurgents could exploit near the position.
The supported side for this record is United States, NATO, and Afghan government forces. The available direct source does not document Taliban or allied militant use of M18A1 Claymores in this conflict.
Sources: Wanat Combat Action In Afghanistan