— Heinrich von Treitschke, German nationalist historian and politician, 1871
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.[28]
Although U.S. President Woodrow Wilson had insisted that the région was self-ruling by legal status, as its constitution had stated it was bound to the sole authority of the Kaiser and not to the German state, France would allow no plebiscite, as granted by the League of Nations to some eastern German territories at this time, because the French regarded the Alsatians as Frenchmen liberated from German rule. Germany ceded the region to France under the Treaty of Versailles.
Policies forbidding the use of German and requiring French were promptly introduced.[29] In order not to antagonize the Alsatians, the region was not subjected to some legal changes that had occurred in the rest of France between 1871 and 1919, such as the 1905 French law on the separation of Church and State.
Alsace–Lorraine was occupied by Germany in June 1940 during the Second World War. Although never formally annexed, Alsace and Lorraine were incorporated into the Greater German Reich. Each was placed under a Chief of Civil Administration (CdZ), who was the Nazi Party Gauleiter and Reichsstatthalter (Reich Governor) of the adjacent German territory. Alsace was administered as part of Gau Baden under Robert Heinrich Wagner and his deputy, Hermann Röhn. Lorraine was administered as part of the Gau Saarpfalz, (later Gau Westmark) under Josef Bürckel and his deputy, Ernst Ludwig Leyser [de].[30] During the war, 130,000 young men from Alsace and Lorraine were conscripted into the German armies against their will (malgré-nous). There were some volunteers for the Waffen SS.,[31] although they were outnumbered by conscripts of the 1926–1927 classes. Thirty of said Waffen SS were involved in the Oradour-sur-Glane massacre (29 conscripts, one volunteer). A third of the malgré-nous perished on the Eastern front. In July 1944, 1500 malgré-nous were released from Soviet captivity and sent to Algiers, where they joined the Free French Forces.
I understand this(was a fascinating reading btw), but it's a 20 years old Dutch-Nigerian football player, maybe shouldn't have taken that seriously what he said..