How does Hampton Sides use imagery in Ghost Soldiers: The Epic Account of World War II's Greatest Rescue Mission?

Imagery:

"The men squirmed over each other and clawed at the dirt as they tried desperately to shrink from the intense heat. They choked back the smoke and the fumes, their nostrils assailed by the smell of singed hair and roasting flesh. They were trapped like termites in their own sealed nest."

"The tedium was excruciating—the monotony, the starchy sameness. The mental torpor wasn't merely caused by vitamin dearth—it inhered in the long spool of undifferentiated days. 'Rice brains,' they called their dull-witted condition."