In August 1914, two Russian armies, Rennenkampf’s First and Samsonov’s Second, invaded the German province of East Prussia. The lone German army there, Hindenburg’s Eighth, had to rely on interior lines and railroads to concentrate against each Russian army in turn. This game focuses on the southern half of the campaign, with the northern half factored into the victory conditions. Those victory conditions vary with the strategic options chosen by each player so neither knows the other’s intent.