You seem to have things mixed up a bit. Germany seized Alsace Lorraine from France in 1871 (Franco-Prussian war) and after that, obviously, France wanted it back. Not to mention that France also...
France did not just want the region, they wanted it back. The German Empire was proclaimed in the Palace of Versailles after the Franco-Prussian war (1870-1871). After the First World War, France,...