I am a retired non-commissioned officer. I want to apply for a passport. I wonder what are the rules for veterans to go abroad to visit relatives and immigrants?

Passport applications are the same as ordinary people. If you visit relatives, it depends on which country you are going to.

If you go to the United States, because you have been a soldier, the United States will carefully investigate you, and the chances of refusing a visa are very high! If you have worked in high-tech and secret departments, it is almost impossible to get a visa. The refusal rate of retired soldiers is higher than that of ordinary people, which is not a problem of immigration tendency. Once, a friend of my father was invited to visit by an American governor. Because the man was a soldier when he was young, he failed to succeed.