1758 marks a turning point in the Seven Years War. For the first time Austrian, Swedish and Russian forces pose simultaneous threats to the Prussian heartland. By mid-August the Russian offensive crests on the Oder River, laying siege to the fortress of Cüstrin. Force marching from Silesia through blazing summer heat, Frederick races to bring about a decisive battle. On 25 August near the village of Zorndorf 43,000 Russians and 36,000 Prussians fight one of the most savage battles of the war. For nearly 10 hours they hammer one another, yet by day's end neither army yields, despite staggering losses - nearly half the Russians and one-third of the Prussians were casualties. Finally, both armies limp away, each claiming victory: the Russians back into Poland; the Prussians to Saxony and a new Austrian threat. Zorndorf is the second game in the acclaimed Battles from the Age of Reason (BAR) series. The system presents a detailed simulation of warfare in the age of linear tactics. It is the framework through which players maneuver historic armies while seeking to discover which combinations of units and formations lead to victory, or are a formula for defeat.