Markings on one truck include "BONG SON," "QUY NHON," "THU PHUOC," and "GIA NHON," indicating specific locations within Vietnam. The reverse side of the photograph is hand-annotated with "PHU CAT" in blue ink and "64" in red ink, further dating the photo to 1964 and identifying Phu Cat as a significant location related to the image content.
