Game was described in an issue of the General, covering the Avalon Hill game called Siege of Jerusalem.
Evidently, AH acquired the rights. The AH version is, according to one of the designers, is "...in many respects, quite different from its Historical Perspectives ancestor....New information, or just new ways of looking at things, manifest themselves. Don Greenwood, to his credit, instituted most of the improvements. But, the core remained...".
Evidently, the game was first sold at Orgins II in 1976, and a 2nd edition in 1980. 4,000? copies published?