In early 1942 Germany had two battleships and a cruiser docked at Brest France that posed a
threat to British shipping. The British Navy set up a blockade in an effort to contain them. Adolf
Gallant sent aircraft to St. Trond, Belgium in preparation for Unternehmen Donnerkeil (Operation
Thunderbolt), this would provide air cover for Unternehmen Zerberus (Operation Cerberus), the
surprise dash the German ships made for home on February 11, 1942. The German ships
caught the British off guard and two days later they were home.