Basically, what I'm interested is how likely is all that to be true, I'm interested in all larger conflicts in the 20th century, like WW1, WW2, Cold War.

I heard somewhere that some countries and their intelligence agencies release top secret documents and things like that after some years, 50 or smth like that (it's highly possible that I am mistaken, so correct me if that's the case).

So is it possible that some of them are not going to be released ever, and I mean the huge ones, like, what happened after some decisive battle, what happened to some POWs, some crimes against humanity in occupied countries. Some espionage things from Cold War. Some reports of battle about how many casualties were there, or weren't. How many ships/tanks/planes were destroyed.

As for me, I have always wondered if those battles in Pacific in WW2 were such a disasters for IJN, like where they lost zillion ships and planes, and US lost like 2 destroyers and 3 boats.

What are your opinions on this? Are we getting the wrong history, beacuse “History is written by the victors.”?

Thanks in advance to whoever replies. :)