The 19th Reserve Division began the war under command of Generalleutnant
Max von Bahrfeldt on the
Western Front, participating in the opening German offensive which led to the Allied
Great Retreat and ended with the
First Battle of the Marne. Thereafter, the division remained in the line on the Aisne and in the Champagne. From May 1915 to March 1916, the division fought in Upper Alsace. It then fought in the
Battle of Verdun until July, when it went into the Argonne Forest. In October 1916, it saw action in the later phases of the
Battle of the Somme. In April 1917, the division fought in the
Second Battle of the Aisne, also known as the Third Battle of Champagne. In May, it was sent to the
Eastern Front, and fought around Riga until September. It then returned to the Western Front, where it saw action in the Battle of
Passchendaele. It was back in the trenchlines at Verdun from October 1917 to April 1918. In August–September 1918, the division faced the French and American
Oise-Aisne Offensive. It remained in the line until war's end. Allied intelligence rated the division as first class. ==Order of battle on mobilization==