This was directly due to the fact that for the first time in history one of the most important problems, with which the military authorities had to deal, was the question of mental diseases and defects. For purposes of comparison and the intelligent consideration of this important subject, the incidence of mental diseases in the army in the past is of considerable interest. The rate in enlisted men, as shown by the Surgeon General's reports, varied from 1.08 per thousand in 1898 to 1.73 in 1911, and was 2.72 in 1900, the only year in which it went above two. In 1912, 1913, 1914 and 1915, when defective mental development, constitutional psychopathic states, hypochondriasis and nostalgia were included in the reports the rates per thousand were respectively 3.45, 3.44, 4.18 and 3.82. The frequency of psychoses was higher in the men serving in the Philippines—2.07 in 1898, 2.79 in 1900, 1.45 in 1905 and 2.01 in 1911. The ratio of mental diseases in the American and English armies has been higher for many years than in the French, Italian, Russian and German forces. Universal military service is supposed to have been the factor producing this difference, the larger establishments naturally more nearly representing the normal insanity rate of the country. From May 1, 1861, to June 30, 1866, in other words, during the civil war period, there were 198,849 discharges for disability from the United States army.[85] Of this number 819 men were discharged on account of insanity, 3,872 for epilepsy and 2,838 for various forms of "paralysis." Based on the mean annual strength of the army, this represented a rate of .34 per thousand for insanity, 1.6 for epilepsy and 1.17 for paralysis. Based on the total number of discharges alone, it represented a rate of 6.0 per thousand for insanity, 20.8 for paralysis, and 28.3 for epilepsy or a rate for the three combined of 55.1 per thousand. These statistics are for white soldiers only. The rate for colored troops, based on the total discharges, was seven per thousand for insanity, 14.3 for paralysis and thirty-six for epilepsy. No information whatever is available as to what the term paralysis includes in these reports. The rate per thousand in the United States army, as has been shown, increased from approximately one in 1898 to three in 1901, during the Spanish war, Philippine insurrection, etc., and dropped back to one again in 1903. Weygandt,[86] who made a study of war neuroses and psychoses in 1904, gives the insanity rate per thousand of the German army during the Franco-Prussian war as .54, the American troops during the Spanish war as 2.7, the British army during the Boer war as 2.6, the Russian army during the Japanese war as 2.0, and the Bulgarian troops during the Balkan campaign .33. The German expeditionary corps engaged in Southwestern Africa reported 4.95 per thousand and a rate of 8.28 including epilepsy and hysteria.