STATISTICS OF ALIEN REGISTRATION
The total registration under the operation of the Selective Service Act, during the whole period, June 5, 1917-September 12, 1918, according to the report of the Provost Marshal General,[128] was 23,908,576. Of these registrants—roughly speaking, one-fifth of the total population of the United States—20,031,493 were citizens; 3,877,083 were aliens. Of the citizens, 1,336,967 (6.67 per cent) were foreign-born and naturalized. Of the aliens, about one in three (1,270,184—32.76 per cent) had declared intention to seek citizenship. More than two and one-half millions (2,606,901—67.24 per cent) were aliens out-and-out, still owing full allegiance to other sovereignties, and of nationality, so far as the war was concerned, divided as follows:
TABLE XXX
Allegiance of Aliens Registered Under the Selective Service Act{1}
| Number | Per Cent | |
| Total registration | 3,877,083 | 100.00 |
| Ages 21–31 | 1,703,006 | .... |
| Ages 18–20, 32–45 | 2,174,077 | .... |
| Cobelligerents (the Allies) | 2,228,980 | 57.49 |
| Ages 21–31 | 1,021,063 | .... |
| Ages 18–20, 32–45 | 1,207,917 | .... |
| Neutrals | 636,601 | 16.42 |
| Ages 21–31 | 249,034 | .... |
| Ages 18–20, 32–45 | 387,567 | .... |
| Enemy and allied enemy | 1,011,502 | 26.09 |
| Ages 21–31 | 432,909 | .... |
| Ages 18–20, 32–45 | 578,593 | .... |
note 1: Second Report of the Provost Marshal General to the Secretary of War, on the Selective Service System to December 20, 1918, p. 90, [Table 23].
We have no figures to show how many of those aliens and declarants registered in the registration of September 12, 1918, were below the age of 21 years; therefore it is not possible to say just what proportion were available for naturalization under the special provisions of the law of May 9th. The previous registration had applied altogether to men above the age of 21, and of course all of those in the subsequently registered class 32–45 were naturalizable so far as age was concerned.
The classification of registrants under the registration of September 12, 1918, never was completed, being stopped by the armistice of November 11th; therefore the availability for service of the citizens and aliens has been reported only for those between the ages of 21 and 31. Of the 1,703,006 aliens and declarants of this age classification, a little less than one in three (538,363—31.61 per cent) had declared intention. The fitness of these for service is shown by the following analysis:
TABLE XXXI
Fitness for Service of Alien Registrants{1}
| Number | Per Cent | |
| Placed in Class I | 414,389 | 24.33 |
| Declarants | 160,594 | 29.64 |
| Nondeclarants | 253,795 | 21.79 |
| Placed in deferred classes | 1,288,617 | 75.67 |
| Declarants | 377,769 | 71.36 |
| Nondeclarants | 910,848 | 78.21 |
note 1: Second Report of the Provost Marshal General to the Secretary of War, on the Operations of the Selective Service System to December 20, 1918, p. 91, table 25.