This lecture was presented at the Spring 2025 meeting of the American Society of Arms Collectors. It was given by Doug Scott, who ran a series of archaeological surveys of the Little Bighorn battlefield and coauthored a book on the results. You can find his book here:
https://amzn.to/443w6kD

I reviewed this book on the web site back in 2013; you can read that review here:
https://www.forgottenweapons.com/book-review-archaeological-perspectives-on-the-battle-of-the-little-bighorn/