Why is Peyton Farquhar not involved with the army in "An Occurrence at Owl Creek Bridge"?

The
narrator tells us that Peyton Farquhar is a wealthy plantation owner who ardently supports the
Confederate cause against the Union Army. Despite his affinity for the Confederacy and his
devotion to the Southern cause, Peyton does not enlist in the Confederate Army. The only
evidence that directly relates to Peyton's decision to not enlist in the Confederate Army is
when the narrator mentions "Circumstances of an imperious nature, which is it unnecessary
to relate here, had prevented him [Peyton] from taking service with that gallant army..."
(Bierce, 2).

This comment suggests that Peyton Farquhar was too imperious,
or arrogant and domineering, to enlist in the Confederate Army. Essentially, Peyton is a
wealthy, arrogant man, who would not be inclined to take commands from a Confederate officer and
be bossed around like a lowly commoner. The narrator does not want to elaborate on the
circumstances of Peyton's "imperious nature" but the reader can infer that Peyton is
too bossy and...