@The-Janus
This is what AndrewAAGamer, one of the best Global 1940 players, said about the Taranto Raid (I think it mostly applies to Europe 1940 as well):
@AndrewAAGamer said in Let's talk the Taranto raid.:
I used to be a big proponent of the Taranto raid, but I am leaning against it recently as I’ve had two games where the German didn’t lose any planes on the counter attack, which was a disaster for the allies. Probably better to do Gibastion as you don’t have to worry that the dice will screw you.
(https://www.axisandallies.org/forums/topic/41082/let-s-talk-the-taranto-raid/2)
Here’s what he said about strict neutrals (while this is about Global 1940, 90% of strict neutrals are located on the Europe map, so it mostly applies):
@AndrewAAGamer said in Violate a true neutrals?:
Both sides should be consistently paying careful attention to “Should I go for the Neutrals?” as the game progresses. Looking for the key indicators that show the Player that “Yes, now is the time to attack the Neutrals.”
Typically, there are three reasons to go for the Neutrals:
Axis #1: The Allies have left their SZ91 fleet exposed if the Neutrals are attacked by Italy, specifically Spain, and that allows the Germans to annihilate a large Allied fleet on the cheap.
Allies #1: The game has come to a standstill and neither side may improve their position as the board is deadlocked. By accepting a short-term disadvantage, the Allies will gain a long-term advantage that may swing the game in the Allied favor.
Allies #2: As you mentioned, the Allies are not making sufficient progress in landings on the European coast so they revert to the simpler strategy of landing in Spain.
Normally, it is the Allies who are attacking the Neutrals and typically they will set up such an attack by being prepared to hit Spain (USA), Portugal (USA), Venezuela (USA), Saudi Arabia (UK) and Turkey (UK) all on the same Turn. In later Turns Chile plus Argentina (USA) and Angola plus Mozambique (UK) are taken. Typically, killing these 28 infantries results in about 11-13 Allied losses or about $36 worth of troops.
The gain in income for the Allies is $15 a Turn. The Axis will usually gain 8 infantries from Switzerland and Sweden, or $24 worth of troops, and $3 a Turn in income from Sweden. That means the total initial loss for the Allies is 60 TUV. (36 troops killed plus 24 infantries gained Axis). Compare this to the $12 swing in income and you can see it take about 5 Turns for the Allies to recoup their initial losses and start making gains from their strategic decision.
As long as the Allies can last those 5 Turns then making the attack makes sense.
BTW, you will notice I did not include Afghanistan as usually the Axis are not able to gain those 4 troops because either they can never liberate them or the Allies kill them at a loss of usually 1 ground unit.
So to specifically answer your question… YES it makes sense depending on the circumstances.
(https://www.axisandallies.org/forums/topic/41838/violate-a-true-neutrals/2)