Try to find a website about military history or a mailing list. Someone should know that answer, and I have found a great deal of information through searches on various military topics. NARA has a website, and can answer some questions. As to the first question, is it possible that the grandmother might have come through Ellis Island? Their site is very helpful also. INS also has a site, which may not contain old information, but perhaps they could refer you to the correct source. Elizabeth