The film is a historical drama set during the reign of Elizabeth I (Flora Robson),focusing on the English defeat of the Spanish Armada, whence the title. In 1588, relations between Spain and England are at the breaking point. With the support of Queen Elizabeth I, British sea raiders such as Sir Francis Drake regularly capture Spanish merchantmen bringing gold from the New World.

• London Films Productions
• Flora Robson
• Raymond Massey
• Leslie Banks
• Laurence Olivier
• Vivien Leigh
• Morton Selten
• Tamara Desni
• Lyn Harding