Danny, That is true, there is that fact. However, wasn't most of the 40 series Orginally being recruited and trained, and equipped as mounted Infantry? It is confusing to me. I have found referrals to the 45th as mounted infantry. Do you think that may be the case here? The more I research the more questions I find! Also, do you think It may have been a recruiting and retention tool to be mounted? I know in my research, that during the 1837 Arkansas Militia call up and Mexican War, mpunted gunmen were authorized to substitute for Infantry. I wonder Anthony you could wade into discussing this with us further?