I’m still digging getting ready for this Saturday’s expedition, and I found this short article that contains plenty of good information. There’s also a short passage in the book The Savage Wars Of Peace: Small Wars And The Rise Of American Power by Max Boot, pages 57-59 (available to read on line).
Of course this makes me all the more excited about the trip, and it brings up other possibilities in the future…like how about the Inch’eon landing?
For more history: https://www.homeofheroes.com/wp-content/uploads/2020/09/Shinmiyangyo-final.pdf