This is a list of militaries that recruit foreign applicants.
This includes any individuals who are aliens of the polity whose armed forces they are being recruited to join by professional recruiters.
The foreigners do not need to be legal residents of that nation, but may gain legal residence status by joining the armed forces.
[1] Recognizing this situation, Greece grants citizenship to broad categories of people of ethnic Greek ancestry who are members of the Greek diaspora, including individuals and families whose ancestors have been resident in diaspora communities outside the modern state of Greece for centuries or millennia.
Anyone wishing to do so must present a number of documents, including "[a]vailable written records ... proving the Greek origin of the interested person and his ancestors".