Asians and Hispanics living in the U.S. who were not citizens, but fought in WWI were:

Answer 1

The answer is that Asians and Hispanics living in the U.S. who were not citizens, but fought in WWI were allowed to enlist in the U.S. military. The War Department issued a directive in 1917 that allowed non-citizens to enlist in the military, and many Asians and Hispanics took advantage of this opportunity.