The US has made grave mistakes,
BS1. After Vietnam, the US happily went to Iraq and Afghanistan where they blew 5 trillion and got zero in return. Actually, only a moron would turn two mortal enemies like Iran and Iraq into semi-friends. And then those pictures of the chopper lifting off the roof in Saigon... and the last plane leaving Kabul. Is this your definition of "learning"?
Russia has never learned from the mistakes of its past and simply repeats them over and over,
BS2. Russia learned from the lesson called Afghanistan and didn't repeat it. We repeated Vietnam.
Ukrainians have learned ... that they can stand up against an unjust government...
BS3. They didn't fire a shot in Crimea. Smart.
Russia doesn't even understand the concept,
BS4. Russia is 140 million people, cities, rivers, lakes, and mountains. Could you be a bit more specific? And also explain how you got that information.