Factual error: At Fort Winslow, the soldier assigned to take Corporal Woodson to the infirmary is referred to as "corporal" and wears a rank insignia of one chevron. A single chevron was not authorized as the insignia of any rank in the U.S. Army until 1920, and even then, it denoted a Private First Class, not a Corporal.
Suggested correction: Lance Corporal was a rank in the US Army in 1892, hence one chevron. Being called a Corporal wasn't too far off, as rank acknowledgment wasn't as rigid as modern times.