People with German heritage make up the largest block of immigrant descendants. You have to know German history and territories in order to understand where and why, and when they left. As of 15 October 2013, 277 people have pinned this item, and I am NOT surprised, as German immigration began slowly in the 1630's, then the Palatinate c. 1710, and steadily since, excepting the 2 world wars. German Genealogy Cheat Sheet.
A Little-Known Government Genealogy Service - USCIS provides genealogy information that may be difficult or impossible to obtain elsewhere. The records include naturalization files, visa applications, and citizenship tests, and may reveal family secrets and mysteries. In addition to relatives, historians or researchers can also request files.