The story largely comes from Custer himself!!
A braggart and huge proponent of self-promotion.
What Custer says he did should be taken with
caution.
That he dashed into Confederaqte lines and took
the flag before anyone knew he was there is absurd.
Much more likely he stole the flag, just as he tried to
steal all the headlines he could.
A habit that would bring disaster 14 years later.

Ken