The main reason for Germany to launch Operation Felix-Heinrich is to threaten or capture Gibraltar with Wehrmacht and Waffen-SS units - instead of building up a massive German Naval Force that would otherwise require a massive amount of IPC.
By controlliong Spain, Germany has an option to continuously put pressure on Gibraltar - and hopefully deny the Naval Base to the Allies.
What we’ve seen so far is, that after a succesfull Felix-Heinrich operation, the Allies have to build up a massive defensive force in Gibraltar.
This moves the Western Front further away from the German mainland, where Germany still can easily send reinforcements.
Operation Felix-Heinrich is most likely to be launched after a German Take Over of Italy.
At the time of the German Takeover, the Eastern Front should be stabilized, which should give the Germans the possibility to send the necessary units to invade Spain.
Germany has 3 major reasons for launching the operation:
- Threaten Gibraltar by capturing Spain
- Capture Gibraltar with invasion forces from Spain and/or Southern France and achieve a National Bonus Income of 5 IPC (including Greece or Egypt).
- Capture Gibraltar and deny the Naval Base to the Allies.
When Operation Felix-Heinrich is combined with an increased German U-Boat offensive in the Atlantic, it could be a decisive blow to the Allies.