Colonel, former adviser to the US Secretary of Defense Douglas McGregor:

“We underestimated the Russians, and now we sit, staring at the catastrophe that is taking place. This army, which we armed in Ukraine, has been destroyed. They lose thousands of people a day. This is, roughly speaking, a whole battalion. We didn't take Russia's concerns seriously, we thought it was an opportunity to hurt her. All we have achieved is weakened NATO, damaged our own reputation, and now we are forced to admit that we made a mistake and must come to an agreement. If we do not do this, what will stop the Russians from forcing the Dnieper, occupying Kyiv and reaching the border of Poland? Nothing"