15th Division ( German Empire ) The 15th Division ( " 15 . Division " ) was a unit of the Prussia n / German Army . It was formed as the 16th Division on September 5 , 1818 in Cologne from the 4th Brigade of the Army Corps in France . It became the 15th Division on December 14 , 1818 . The division was subordinated in peacetime to the VIII Army Corps ( " VIII . Armeekorps " ) . The division was disbanded in 1919 during the demobilization of the German Army after World War I . It was recruited in the densely populated Prussian Rhine Province , mainly in the Lower Rhine region . Combat chronicle . The 15th Division fought in the Austro - Prussian War in 1866 , seeing action in the Battle of Königgrätz . In the Franco - Prussian War of 1870 - 71 , the division fought in the Battle of Gravelotte ( also called the Battle of Gravelotte - St . Privat ) and the Siege of Metz , and then in the battles of Amiens , Hallue , Bapaume , and St . Quentin . During World War I , the division marched through Luxembourg , Belgium and France , in what became known to the Allies as the Great Retreat , culminating in the First Battle of the Marne . In 1916 , it fought in the Battle of the Somme . It was briefly sent to the Eastern Front in late 1916 . It participated in the 1918 German Spring Offensive , and defended against the Allied counteroffensives , including the battles of Oise - Aisne and Meuse - Argonne . Allied intelligence rated it as a good but second class division . Order of battle in the Franco - Prussian War . During wartime , the 15th Division , like other regular German divisions , was redesignated an infantry division . The organization of the 15th Infantry Division in 1870 at the beginning of the Franco - Prussian War was as follows : Pre - World War I organization . German divisions underwent various organizational changes after the Franco - Prussian War . The 15th Division ' s 30th Infantry Brigade went to the 16th Division in exchange for the 80th Infantry Brigade , formed in 1897 . The organization of the 15th Division in 1914 , shortly before the outbreak of World War I , was as follows : Order of battle on mobilization . On mobilization in August 1914 at the beginning of World War I , most divisional cavalry , including brigade headquarters , was withdrawn to form cavalry divisions or split up among divisions as reconnaissance units . Divisions received engineer companies and other support units from their higher headquarters . The 15th Division was again renamed the 15th Infantry Division . Its initial wartime organization was as follows : Late World War I organization . Divisions underwent many changes during the war , with regiments moving from division to division , and some being destroyed and rebuilt . During the war , most divisions became triangular - one infantry brigade with three infantry regiments rather than two infantry brigades of two regiments ( a " square division " ) . An artillery commander replaced the artillery brigade headquarters , the cavalry was further reduced , the engineer contingent was increased , and a divisional signals command was created . The 15th Infantry Division ' s order of battle on April 7 , 1918 was as follows :