The Hidden Battle (2018) is a Documentary film that follows during the Second World War, the Allies threaten to attack Spain, an allegedly neutral country, if the Francoist regime keeps allowing Nazi Germany to extract Galician tungsten, a strategic mineral, paramount to the war effort. Currently, you can watch The Hidden Battle on Amazon Prime Video, Amazon Prime Video with Ads, Amazon Video. Streaming availability may vary by country and platform over time. Fans of documentary movies may also want to explore similar titles below.