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If Spain joined the axis would they attack Portugal? If they attacked Portugal Britain would send troops to defend them meaning they have less troops elsewhere. Depending on when they joined Vichy France would not exist and the whole of France would be divided between Germany, Italy, and Spain. How close would Spain be to the other axis? The war would be longer if Spain joined. The axis would still fall however would the extra time taken to invade and conquer Spain mean that the Soviets take more of Europe? How would this affect the cold war? If the time taken in Europe took longer might nuclear weapons be used in Europe? How would this affect the use of nuclear weapons after the war? Might Spain break up. For example would Catalonia rise up against Franco and declare themselves a independent nation? Might some regions of Spain join Portugal? Would would Europe look like today? What would happen? What you think?