When did Roman Archers start utilizing a Thumb Draw?

For additional information, I would recommend these videos: The Historian's Craft, "How Barbarized was the Late Roman Army? Weapons Burials, Barbarian Influence, & Militarization"    • Видео   The Historian's Craft: "The Late Roman Army, Part I":    • Видео   Ryddragyn, "Sarmatian Thumb Ring Review"    • Sarmatian Thumb Ring Review   Links to Available Roman, Byzantine and Sarmatian Thumb Rings: 'Byzantine' from Custom Thumb Rings: https://www.customthumbrings.com/shop... 'Sarmatian' from Custom Thumb Rings: https://www.customthumbrings.com/shop... My thumb ring: 'Archer's thumb ring (medium) by HopkinsForge: https://www.etsy.com/listing/86983755...