In the final estimation, there are three versions of the battle of Zelenopillya

An interesting account of the difficulty of ascertaining the truth of events when there are powerful interests involved.  From The Battles of Zelenopillya: Part 1 of 2.

There are three completely separate versions of a battle in Ukraine. One version exists in the United States and western European countries, where it is popular among national security experts, officers, and military strategists. Another version exists Ukraine, where it is a well-known chapter in the history of the Russo-Ukrainian war. They agree on the fact that a battle occurred, but the circumstances surrounding that battle are remarkably different, as are the lessons that each country have drawn from it. The third, Russian version, doesn’t agree with either of the others.

[snip]

In the final estimation, there are three versions of the battle of Zelenopillya. The Russian version seems certain to be a lie (though, interestingly, only the Russians know the truth). The U.S. / western version is probably not true, and even if some of its details are correct, it gets key details wrong, chiefly, the critical role played by advanced systems able to hit targets on the move. The Ukrainian version—which is that poorly disciplined troops exposed themselves to a risk of they were not aware, like a swimmer entering the ocean at dusk, unknowingly floating above some hungry toothed monster—is most correct, and, therefore, should be seen as such hereafter.

Establishing the “true” battle of Zelenopillya (or, at least, the truest currently accessible) resolves one paradox, but creates another, different problem entirely. If the Ukrainian version is “correct,” and fairly easily confirmed—a couple days of googling and fact-checking, as well as retaining a translator then tracking down living veterans of the battle is sufficient to debunk the U.S. / western version—readers are left with evidence of an astonishing, almost unthinkable situation. The U.S. military and ostensibly nonpartisan think tanks such as RUSI cannot, apparently, objectively interrogate their own analysis. As things stand now, a baseless rumor is being used as fact in U.S. Army doctrine.