I won't go into too much detail here because if you're reading this, you most likely know how A&A works and besides, it's almost 2:00 AM!
This strategy works best if Germany and Russia are knocking heads and England and the United States have the ability to build transports unmolested by U-Boats and the like.
Best case scenario:
1.) England makes an amphibious assault on Spain, paying 3 IPCs for violating neutrality. Land as many infantry as you can. England's purchases for this round are really dependent upon what the US has available to reinforce Spain. More transports to funnel English units to Spain in the next round is an option, as are fighters to reinforce Spain.
2.) The United States lands with all available units in Spain to reinforce Britain. Infantry again is preferable this first round. Of course, if you can land fighters, land them! Purchases are dependent on the situation, but more transports and infantry aren't a bad idea if the objective is to hold on to Spain.
3.) Germany might be in a heap of trouble:
a.) If the German player has been building tanks and hasn't reinforced Europe with much infantry, he's going to find himself with a horrible option. Does he turn his tanks destined for the Russian Front to deal with the new front in Spain? If he does, those tanks involved in the fight will be at least 2 turns away from getting back to the action in the East (Spain, Western Europe, Germany, Eastern Europe, Ukraine...).
b.) Does the German player throw what few infantry (probably) that he has in Western Europe to attack Spain, thereby weakening Western Europe and forcing him to redistribute troops to defend Western Europe?
c.) Does he ignore the threat for a turn, allowing the English and US to reinforce Spain even more?
In any event, the Allies capturing Spain forces the German player to defend it or defend against it. This causes Germany to become overextended in the West. It is a lot harder to defend Spain than it is Western Europe: newly purchased infantry takes 2 turns to get there. Germany having to occupy Spain makes Western Europe weaker. Suddenly instead of having to defend one territory to the West, Germany must defend two.
Of course, the US needs to be in a position to be able to commit forces to the European Theater. If Japan is giving the US trouble in the Pacific, it'll be harder for the US to commit forces.
However, one good coordinated landing at the right time can absolutely seal the game for the Allies. A combined force of 8 infantry and a fighter (4 British Infantry transported by 2 transports, 4 US Infantry transported by 2 transports, 1 US fighter) commits only modest resources and provides a pretty good defense. The German player will almost assuredly be forced to pull tanks and/or aircraft from fighting the Russians to attack Spain if he chooses to do so. This gives the Allies a chance to inflict casualties on the attacking Germans and gives the Russians a major opening in the East- either by buying them time or by making an assault into German territory a bit easier.
This option has worked so well that it probably could constitute as a "glitch" (explotation?) in the game mechanic.











. As much as any A&A player hates it, buying infantry and waiting for the inevitable seems to always be the result!


