Many countries in Europe made detailed war plans in the early 1900s because they felt a major war was imminent. Germany developed the Schlieffen Plan to defeat France quickly through a flanking maneuver before facing Russia, while France had Plan XVII to attack into Alsace-Lorraine. Russia planned to overwhelm Germany and Austria-Hungary with its large army size. Britain established an expeditionary force and collaborated militarily with France. All the plans assumed the war would be brief due to economic pressures, though no one planned for a prolonged conflict.