I honestly thought I was going to lose after so much losses in France ( 2 tanks, 2 paras , fantastic defense of France, gave me hints for my 3 PBEM games as Allies, although I destroyed all the BEF apart from the HQ ), but the URSS was kind of easy ( I think its a mistake to defend that far, you lose a lot of MPP very quickly, and I think in the URSS campaign you need to delay the Axis to get their NM objetives as much as possible )
Air power was devastating in Russia without no AA
Also China was on his knees very soon even after Beijing was taken ( my mistake, but allowed me to destroy a couple of armies that I surrounded and you couldnt rebuild cheap). Changsa and Nanjing was taken early ( both are the keys to defend China in my opinion )
Even with that, I made the mistake to build 4 naval bombers with Japan, that did nothing in the war until the invasion of India, where the Royal Navy was sunk losing 4 carriers for no losses.
I could evacuate NA after some delays losing just a couple of italians, but failed in Abysinia ( should have sent more italians there )
I almost failed my assault in Hawaii, but after taken it, the Pacific was a JAP ocean and I could focus on India.
In any case, fantastic experience in my first PBEM game, thanks and happy to do a rematch soon!