As others have stated, Major Piercy was commanding what remained of Mj Livingston's former battalion. I don't believe they actually accompanied Price during his raid though, but took advantage of his presence. Robert Peck, in the serial of his Civil War experiences which appears in the National Tribune(a portion of it appears in 24 Nov 1904 issue) talks about it. It was this engagement where CPT Henry Dobyns of the 6th Kansas Cav was killed.