[Lucius Cornelius Sulla]

Also, the article mentions that the Poles are making quick counter-attacks with the “finest cavalry in the world.”

This was entirely horse cavalry, correct? The guy who wrote this article would have benefited from a critique by General Patton.

[henkster]

It was entirely horse cavalry, but not really intended to fight as such, with lances and sabres and whatnot. Instead, the proper 18th or 19th Century term would have been “Dragoons.” They were armed with rifles, usually light carbines, and in the event of a firefight, intended to dismount and fight on foot as light infantry. By 1939, the whole horse thing was intended for mobility to the battlefield, not on it.