John Wayne's The Conqueror is a problematic movie in more ways than one, with the 1956 picture being one of Hollywood's worst productions — and possibly, having one of its deadliest sets.

"The Conqueror" saw the Duke step into the Mongol ... with The New Times describing the 1956 catastrophe as "an Oriental Western" roofed with a script sparking "few unintentional laughs." ...