In 1916, during World War I, Strohl was serving in the Neurological Centre of the French Sixth Army with Guillain and Barré. The three doctors noticed that two soldiers, who were suffering from muscular weakening and pain along with paresthesias,[1] had an unexpected amount of spinal fluid protein production.[2] Strohl is credited with performing the electrophysiological tests on the soldiers. Eventually, the two patients were able to recover from their illness.