Two addressed the case of a war with a Franco-Russian alliance and reconciled a defensive strategy with counter-offensive operations. Aufmarsch II West favoured a counter-offensive against the French offensive before moving to deal with the Russian and Aufmarsch I Ost favoured defeating the Russian offensive before moving to deal with the French. The greater density of railway-infrastructure in the west meant that Schlieffen favoured Aufmarsch II West as it would allow a greater force to be deployed there and thus a greater victory to be won over the French attackers.[91]