Terry Bamber

Indy is ordered to locate and destroy a powerful German artillery gun that is mysteriously able to appear and disappear at will, leaving death and destruction in its wake. Assisting him is a colorful group of soldiers nicknamed "The Old and the Bold" because of their old age and reckless courage. Their mission takes them on a dangerous journey across the German-held veldt via wagon train and hot-air balloon. Overcoming all manner of obstacles presented by the enemy, his own side and the harsh African terrain, Indy relentlessly follows the trail of the mega-gun right into the bowels of a secret mountain hideout, where he plans an explosive end for the phantom train of doom.

Christopher Columbus believes he can find an alternative route to the far East and persuades the King and Queen of Spain to finance his expedition...