One of the Missing (1968)

Plot

During the American Civil War, a Southern soldier embarks on a mission to scout enemy lines but finds himself ensnared under a massive heap of debris after a Northern cannon barrage. As he struggles to escape, the precariously positioned loaded weapon threatens his life with every move. The tension builds as he confronts the grim reality of his situation, battling both the physical obstacles and his own mortality in a desperate fight for survival.