Several years ago, I gave a talk at the New York Military Affairs Symposium. It was a good talk, but it was necessary to re-record it. There's no Q&A, but the presentation has been updated a bit with more recent work and references. The original, with the Q&A session at the end, is still available here. https://www.c-span.org/video/?433629-2/design-history-m4-sherman-tank-world-war-ii Other things referenced in this video. Myths of American Armor: https://www.youtube.com/watch?v=bNjp_4jY8pY Modern US Army procurement processes: https://www.youtube.com/watch?v=oYzzwZpqNUE Parshall talk on German/Soviet AFV production. (Second speaker). https://www.youtube.com/watch?v=N6xLMUifbxQ Barnes/Devers 76mm transcript: https://worldoftanks.com/en/news/chieftain/The_Chieftains_Hatch_Barnes_Call/ M4A3E2 Jumbo. https://youtu.be/kCqMzzU5gB0 Quad cities tank arsenal (M7 Tank): https://www.youtube.com/watch?v=9AXSXqTrSoU Financial donations: Patreon: https://www.patreon.com/The_Chieftain Direct Paypal: https://paypal.me/thechieftainshat Utreon: https://utreon.com/c/thechieftain Merchandise https://the-chieftains-retail-hatch.creator-spring.com/ Public facebook page: https://www.facebook.com/TheChieftainArmor