The last prominent social event before the First World War was the inauguration of the "Rosengarten" (rose garden) by Princess Hildegard of Bavaria in June 1914. As a consequence of the First World War, Zweibrücken was occupied by French troops between 1918 and 1930. In the course of the "Kristallnacht" in 1938, Zweibrücken's synagogue was destroyed. On the outbreak of the Second World War the town was evacuated in 1939-1940, as it lay in the ‘Red Zone’ on the fortified Siegfried Line. Shortly before the end of the war, on 14 March 1945, the town was nearly completely destroyed in an air raid by the Royal Canadian Air Force, with the loss of more than 200 lives. On 20 March, American ground troops reached Zweibrücken. The town became part of the new state of Rhineland-Palatinate after the war.