Excerpts from Books and Wikipedia
"Frederick’s only chance was to prevent the French and the Austrians uniting their armies, so he hurried west to meet the former. On 5 November he found them at Mücheln, some 15 miles (25 km) west of Leipzig. They were 30,200 strong, an imposing total swelled further by 10,900 imperial troops under the command of Prince Joseph Friedrich of Saxony-Hildburghausen. Although outnumbered almost two to one, Frederick was anxious for battle and took up position facing west between the villages of Bedra and Rossbach, about four kilometres from the French camp. What followed was one of the most decisive victories against the odds in military history. . . . With the Austrians now forced to evacuate Silesia, including Breslau, the first year of full campaigning in what was to become the ‘Seven Years War’ ended very much in Prussia’s favour." [Blanning: Pursuit of Glory, p. 580-1] "The Battle of Rossbach marked a turning point in the Seven Years' War, not only for its stunning Prussian victory, but because France refused to send troops against Prussia again and Britain, noting Prussia's military success, increased its financial support for Frederick. Following the battle, Frederick immediately left Rossbach and marched for 13 days to the outskirts of Breslau. There he met the Austrian army at the Battle of Leuthen; he employed similar tactics to again defeat an army considerably larger than his own." [Wikipedia]