Revolution of 1848. The merger of Alsace into Germany in 1871–1918 lessened antisemitic violence. The constitution of the Reichsland of 1911 reserved one seat in the first chamber of the Landtag for a representative of the Jewish Consistory of Alsace-Lorraine (besides two seats respectively for the two main Christian denominations). Struggle between France and united Germany The Franco-Prussian War, which started in July 1870, saw France defeated in May 1871 by the Kingdom of Prussia and other German states. The end of the war led to the unification of Germany. Otto von Bismarck annexed Alsace and northern Lorraine to the new German Empire in 1871. France ceded more than 90% of Alsace and one-fourth of Lorraine, as stipulated in the treaty of Frankfurt; Belfort, the largest Alsatian town south of Mulhouse, remained French. Unlike other member states of the German federation, which had governments of their own, the new Imperial territory of Alsace-Lorraine was under the sole authority of the Kaiser, administered directly by the imperial government in Berlin. Between 100,000 and 130,000 Alsatians (of a total population of about a million and a half) chose to remain French citizens and leave Reichsland Elsaß-Lothringen, many of them resettling in French Algeria as Pieds-Noirs. Only in 1911 was Alsace-Lorraine granted some measure of autonomy, which was manifested also in a flag and an anthem (Elsässisches Fahnenlied). In 1913, however, the Saverne Affair (French: Incident de Saverne) showed the limits of this new tolerance of the Alsatian identity. During the First World War, to avoid ground fights between brothers, many Alsatians served as sailors in the Kaiserliche Marine and took part in the Naval mutinies that led to the abdication of the Kaiser in November 1918, which left Alsace-Lorraine without a nominal head of state. The sailors returned home and tried to found an independent republic. While Jacques Peirotes, at this time deputy at the Landrat Elsass-Lothringen and just elected mayor of Strasbourg, proclaimed the forfeiture of the German Empire and the advent of the French Republic, a self-proclaimed government of Alsace-Lorraine declared its independence as the "Republic of Alsace-Lorraine". French troops entered Alsace less than two weeks later to quash the worker strikes and remove the newly established Soviets and revolutionaries from power. With the arrival of the French soldiers, many Alsatians and local Prussian/German administrators and bureaucrats cheered the re-establishment of order. Although U.S. President Woodrow Wilson had insisted that