Joel McConnell,
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Two of the soldiers that you mentioned appear in my 1,046-page book that is from handwritten records.
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From my 200+ page Name Index:
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VOILES, VOYLES, Wm. M. Voiles, Vails, b-1836 MO; m-Emily (Christian) Hale Voyles; 11th Cav, Co H; Hawpe's 31st, Co H (Hunt Co, TST)
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HALE, HAIL, Creed Hale (b-1838) m-Emily (Christian) Hale Voyles; McCulloch's 1st Cav, Co's K, I; Taylor's 8th Cav, Co D (Hunt Co, TST)
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The evolution of Hawpe's 31st Cavalry should be pointed out. Below is from page 5 of my Appendix that implies that Marshall was a Hunt County resident, whose military unit became Hawpe's. etc. ... etc. :

31st [T.C. Hawpe’s - F.J. Malone’s-Looscan’s] Cavalry
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Patti, prochette@Juno.com