The time frame of the book is not specified .
The time frame of the book is not is probably set between the birth of Attila the Hun in 406 AD , and the rise of the Mongol ruler Genghis Khan in 1162 AD .
The time frame of the book is not specified , but is probably set between the birth of Attila the Hun in 406 AD , and the rise of the Mongol ruler Genghis Khan in 1162 AD .