You mean the sword on the wrong side, but that could be due to a reversed negative.
Next Time I won't use a picture from an article you can backtrack to to find the answer.
By the way since the rest of the Marine Veterans in the picture are holding their rifles with their right hands what makes you believe that the photo is reversed?
“Next Time I won’t use a picture from an article you can backtrack to to find the answer.”
I didn’t backtrack. You are fishing. And since they are not in formation, they could be holding the rifles with either hand. One has one leaning against his leg. I figured that it was more likely they were holding the rifles with their other hand than an officer strapping his sword on the wrong side.