Rock of Gibraltar: Gibraltar is a small, narrow peninsula, located at the southern edge of Spain. It overlooks the Strait of Gibraltar, and the northern coastal areas of Africa. Over the centuries, Gibraltar's unique position at the western entrance of the Mediterranean Sea, made it the focus of territorial power struggles, and those struggles (all be them peaceful) continue to this day.
Nazi invasion maps of the USA. Plan Four is the much-discussed invasion by way of Gibraltar-Dakar-Natal-Trinidad, which President Roosevelt’s Good Neighbour policy has tried to defend against. It is based on combining the Japanese, German, Italian and Vichy navies, freed by the capture of Gibraltar and Suez. They must fight the Allied fleets somewhere. Invasion pours up the Mississippi Valley.