1915, January to June1918
Back from Italy and he was conscripted and ordered to Frankfurt a.M., where he commenced his military training in January 1915. Three months later he was moved to the west front. His experiences along the front are captured in 76 drawing and several smaller landscape paintings and one surviving self-portrait.
Four months before German surrender he was badly injured during the battle of the Marne. He damaged his back and he suffered a temporary paralysis on his left side, which would regularly return in his later life. In the spring of 1919 he was released from a rehabilitation centre in Konstanz-Petershausen. Although he initially needed crutches to move around his health improved and by the summer he could once more walk unhindered.