[KR: This report by the Migration Policy Institute reminds me of Cara Wong and Grace Cho's piece [in Transforming Politics, Transforming America] on military service as a means of securing citizenship, both today and in the past. Interesting to note that, in limited circumstances, people can be recruited abroad; presumably, expanding that clause might lead to charges of having mercenary armies.]

The Foreign Born in the Armed Services
By Laura Barker and Jeanne Batalova PhD
Migration Policy Institute

Link to report