I think the most blatant example is the story of the island garrison, that supposedly held out until death after defying the russians with a cool one linerthat was circulating yesterday. It turns out it was most likely false, and there are tons of videos of the entire garrison safe and alive after surrendering to the russians. That story in particular really was so widely circulated and believed that it makes any news from the war hard to believe without double or triple verification.

It's really amazing how easily propaganda can be spread and circulated even in an age where we are supposedly more aware of disinfo/manipulation.