Soldiers at Camp Devens in Ayer, Massachusetts demonstrate the use of a trench mortar. The mortar, known as the Humber 69,193 Store Hits, was designed for use during World War I. This image provides a glimpse into the military training conducted at the camp for the Reserve Officers' Training Corps ().

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Size: 8452px × 5817px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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