[quote=@Ithradine]
[@Ammokkx]

The emergence of the Fleet of Fog in 1939 is still part of the history. 1949 is the year that the last major battle between humans and the Fleet of Fog occured, which is why it is mentioned in Shinano's Bio, resulting in an absolute defeat for humanity.

There are certain ships, such as the Yamato, that I am reserving for the purposes of the plot. If you really want the Yukikaze, I can make it work without much difficulty.
[/quote]

Oh neat, I'm grabbing the Yukikaze then.

Still though, from what I've been reading, the ships only got sighted starting 2012 and got in full force 2038. Even if we take the start of the re-activation, that was in 1945, and halted because the Admiral code wasn't around.

I'm going off the assumption the Fleet of Fog didn't attack humans until 2039 here, as stated in the OP. 1949 seems like a really weird date in that respect. I'd assume it was 2049, as that's a solid chunk of time after the re-activation of the Fleet of Fog, rather than nearly a century prior.