After the ceasefire following the Fall of France in June 1940, Alsace was annexed to Germany and a rigorous policy of Germanisation was imposed upon it by the <answer>Gauleiter Robert Heinrich Wagner</answer>. When, in July 1940, the first evacuees were allowed to return, only residents of Alsatian origin were admitted. The last Jews were deported on 15 July 1940 and the main synagogue, a huge Romanesque revival building that had been a major architectural landmark with its 54-metre-high dome since its completion in 1897, was set ablaze, then razed.
Who imposed the rigorous policy of Germanisation?
Gauleiter Robert Heinrich Wagner