there is no such quote in “she wore a yellow ribbon” or any other John Wayne movie, Dems spun this as a quote to cover for Biden. The closest line in She Wore a Yellow Ribbon is
a spoken line, a voice-over, in the John Wayne movie She Wore A Yellow Ribbon (1949) that uses the term “dog-faced soldiers”. but not as he used it.
I guess there was a 1952 Tyrone
Power film named Pony Soldier.
Cheyenne warriors were known as Dog Soldiers and US cavalry men were called Pony Soldiers. There were all black cavalry units known as Buffalo Soldiers.