Oh, actual horses.
I was thinking the title was wrong. Or maybe that cavalry is a modern warfare term for something.
The thumbnail is a bit hard to see.

Nope.
Clicked through, and there it is. A picture of a soldier riding a horse. Like, full on galloping.
And the picture is clearly from a drone that is very very close.

When I read stuff like this, my hope surges again that Russia is not far from a collapse, but they still hang on. It's the only thing that impresses me about Russia.