For decades the story was told that Nazis exterminated a bunch of Polish Jews in the forests. Then somewhere around 1990, the Russians had to admit that it was them that murdered Polish Jews in the forests of Katyn. They dug up some old classified documents that had been sealed since the 1940's and found out that the Russian military had indeed murdered many Jews during and before WWII.
For decades the story was told that Nazis exterminated a bunch of Polish Jews in the forests. Then somewhere around 1990, the Russians had to admit that it was them that murdered Polish Jews in the forests of Katyn. They dug up some old classified documents that had been sealed since the 1940's and found out that the Russian military had indeed murdered many Jews during and before WWII.