This issue has variants.
Original index by Max Capp. Index done on fourth edition HRN 167, March 1965. Also exists in an HRN 143 edition. The HRN 143 edition includes a half-page "Coming Next" promo for # 147, Ben-Hur. The cover thumbnail, however, is a preliminary sketch, rather than the actual cover image.
The cover art is probably a representation of the clash between Lieuteneant Yan Skshetuski and Burdabut, even though in the story the characters wear different armor.
An adaptation of the With Fire and Sword (original title: Ogniem i Mieczem) novel, first published in 1884. Splash page intro: "More than three hundred years ago, Poland was a vast power stretching from the Baltic Sea to the Black Sea. This area included the Ukraine, home of the fierce, daring cavalry -- the Cossacks. The year 1647 in Poland was a year in which there were strange signs in the heavens and on the earth. First there was a great eclipse of the sun, and soon after a comet appeared in the sky. In Warsaw, a tomb was seen over the city and a fiery cross in the clouds. Wolves and vampires howled in the night and whole legions of ghosts marched. These were believed to be signs a great war was coming."