In 1865 the 13th Amendment provided that neither slavery nor involuntary servitude, except as punishment for a crime, shall exist in the United States. I have heard it said that slavery and indentured servitude are the two forms of servitude that were abolished. However, a commonplace practice was that parents signed up their 12- or 13- or 14-year-old son as an apprentice to a tradesman, and such an apprentice was forbidden to resign. If he left his master, the master would advertise in newspapers that whoever found him should arrest him and return him to his master, and the master would sue anyone who employed his "runaway apprentice" (google that term!) and the court would award damages.
Was that kind of apprenticeship also abolished by the 13th Amendment?