Chuck Norris was to appear in this film, but he withdrew following the helicopter crash during the making of Delta Force 2 (1990).
Peter Manoogian was originally set to direct before Sam Firstenberg stepped in.
Outside of the US this film went straight to video in almost every country.
Outside shots of Kaddal's monastery are actually of St. George's monastery in Wady Kelt, a gorge not far from Jericho in what is today the Palestinian Authority. In the time of filming, this area belonged to Israel. The underground caverns, allegedly under the fort, are in fact located more than a hundred km to the north east, in the Beit Guvrin national park, Israel.
Nick Cassavetes is the son of actors John Cassavetes and Gena Rowlands, while Eric Douglas is the son of actor Kirk Douglas.