From the publisher's website:

The Blood & Steel Expansion Pack is designed by Paul Rohrbaugh and is an extension of the highly successful Blood & Steel folio game on the battle of Kursk.

The Expansion Pack involves the two other pivotal battles around the Kursk salient: Oboyan Hills and Rzhavets bridgehead using the Blood & Steel game system.

Expands:

• Blood & Steel

Contents:

• 1 11"x17" Oboyan Hills Map
• 1 11"x17" Rzhavets Bridgehead Map
• 1 5/8" full color, die-cut sheet of counters
• 1 Rules booklet
• 1 Game Folio
• 1 deck of 43 Formation and Airstrike playing cards.