Well depending on when Spain entered it could have a large impact on UK operations in the Med if Gilbrator gets taken. Which after Spain enters the war it isn't really in-doubt that Gilbrator will fall.
Assume that Franco falls into an open sewer and dies, and that a more gung-ho (and more stupid) replacement is a Hitler fanboy (because Franco is smarter and wilier than Hitler is, and isn't about to go committing a national blunder of Hitlerian magnitude when he's got power and has been busily shooting all the people who want to dispute that fact). Gibraltar falls once France does and Hitler pushes a division through to help.
The Azores fall after Gib does because there is nothing Axis that can stop the RN taking them, and function in the same way as Gib.
Spain is blockaded and starves.
Spain attacking Portugal might be successful, will certainly be bloody, and just ensures that Portugal starves too. Spain not attacking Portugal leaves the possibility for food shipments to come in, but at a punitive cost.
It's not like there was food to spare in Axis Europe that Franco could obtain anyway.
I very much doubt that the Rock would fall. Franco's Spain wasn't what I would call in very good shape at ANY point in the 1940s. All this does is guarantee a front in Spain come 1943 or 1944.
D'oh! Yes, Canaries.The Azores don't fall unless Salazar brings Portugal in as well. The canaries probably wouldn't last long though.
It doesnt even need to be assaulted. It is useless the moment Axis park an artillery battery nearby.If the Germans attack it the rock will fall. Any fixed fortification fortress can be taken. It will not be a cake walk but the German army knows how to assault fortresses.
If the Germans attack it the rock will fall. Any fixed fortification fortress can be taken. It will not be a cake walk but the German army knows how to assault fortresses.