I think that night warfare (night bombing, night fighters, naval night gunnery, infrared night sights) should be added. A 'night warfare' technology can be added that would show up on air, naval, and land units. The attacker would specify on each attack how much weight to place on night operations. The result would be that an attacker with a higher night warfare rating that shifts the attack focus towards night warfare would be more successful against a defender with a lower night warfare rating than he would have been if he focused his attack in the daylight hours:
* A low rated 'advanced aircraft' fighter unit with a high 'night warfare' rating would fair well at night against a high rated 'night warfare' bomber unit on a night bombing mission with a high rated 'advanced aircraft' escort unit that has a low 'night warfare' rating. Low rated 'advanced aircraft' with a high 'night warfare' rating would also be instructed to not interdict daylight raids else they be slaughtered by escorts. This reflects the high effectiveness of a low rate 'advanced aircraft' like the Bf-110 as a night fighter in spite of its total uselessness at a daylight fighter.
* A high rated 'night warfare' naval unit like a cruiser would fair well against battleship of greater power but lower 'night warfare' rating.
* A land unit with higher 'night warfare' rating would be more successful in combating a stronger opponent with a weak 'night warfare' rating.
Night warfare was critical in the air war and even more so in the naval engagements of the war. Historically, it was not as critical a factor in the ground war because the germans employed infrared technology very late in the war in Europe. However, modern warfare has amply demonstrated that the infrared night attacks would have had a much greater impact if they had been implemented in an earlier stage of the war. Night Warfare Technology would add a new dimension of strategy to the game along with historical accuracy. This major facet of the technological arms race could be added and yet not make the technology dimension too complicated.
v/r,
tk