First game of AAP:40 we played, one of the main thoughts was to deny the US those 40 IPCs as long as possible.
We soon began to see that if Japan waited until J3 to attack, then Britian recieved a considerable boost to their IPC level that nearly offset the 40 IPCs the US would not get on T2. So we thought OK, Japan would be better off attacking J2 and denying Britian the extra IPCs.
So that thought pretty much dominated our thinking for many games.
Now we’re looking at the J1 attack, and here’s how those 40 IPCs figure into the decision.
First of all, the US doesn’t get an extra 40 IPCs, that is nothing more than a myth. It’s actually an extra 33 IPCs if Japan attacks on J1 that the US gets.
From most all of the accounts I’ve read, the J1 attack means that Japan will be taking the PI on J1. That means that the US will be collecting 50 IPCs for the western US, 2 for alaska, 1 for Hawaii, & 2 for Mexico. Atotal of 55 IPCs. Had Japan not attacked, the US would be collecting 22 IPCs. Do the math, it’s only a difference of 33 IPCs if Japan attacks J1 as opposed to J2.
As far as the J1 attack goes, the US will loose everything in the PI, including the bomber, the DD & the transport. The bomber alone is an extra 12 IPCs that will offset the extra 33 the US will get. The US is also going to loose the transport in Hawaii, another 7 IPCs. If you used to sneak out the DD & transport from the PI, then the offset in IPCs the US will loose in aJ1 attack, it looks something like this: 12 (Bomber) + 8 (DD) + 14 (PI & Hawaii transports) = 34.
34 extra IPCs lost vs a gain of 33 by the US. Hmm, no reason for the Japanese to not attack early for fear of giving the US extra income from J1 to J2.
The British are going to loose their BB & those two transports right out of the gate without getting to the DEI. Alot of the time, the British BB escapes destruction in a J2 or J3 attack to fight on usefully for the Allies. In every game I’ve played, the British transports get whacked on J2, and don’t last long in a J3 attack. So loosing them on J1 is nothing new. However, loosing at the very least 8 IPCs the troops that they take to the DEI will collect, is a real loss for the British in a J1 attack. That plus the 20 for their BB. So a J1 attack causes the loss of 28 IPCs more for the British from a J1 to a J2 attack.
So the bottom line is that the Japanese have a lot to gain in the IPC department by attacking on J1 than waiting for J2 or J3. As long as the Japanese take the PI when they do attack, the US is not going to gain 40 IPCs, they will only gain 33, as the 2 lost for the PI plus the extra 5 IPCs lost for the national objective will automatically take 7 of those extra 40 IPCs away from the US.
When you start looking at the added income the US will gain as 33, then deduct the extra stuff the Japanese are going to cost the Allies in a J1 attack, then that bonus income isn’t much of a deterrent at all.
In fact, the Japanese have more to gain by attacking early, as far as IPCs go.
Waiting, although it does keep the Western US to only 10IPCs, is going to put more IPCs in the Allies pockets than the extra IPCs the US will get by attacking right out of the gates!