I ran Simulations Publications, Inc (SPI), a company that published over 400 of these games while I was there (1969-80). Most of these were wargames. Peace games don’t sell as well, which says something about us all. We’d rather fight. Kill for peace and all that.
You can obviously learn about what happened on Little Round Top by reading about it, but you can gain insights unavailable in books by pushing bloodless little cardboard representations of Colonel Oates’ Alabamians toward Professor Chamberlain and his men from Maine.