In my era, elementary school American history was essentially a thumbnail view of key persons and significant events. More detailed American History was a 7th grade course; Social Studies was a re-labeled Civics course; Ancient and Medieval history, once required for college prep track became an elective; Modern European History, IIRC, was an elective.
Classical history and the small-L liberal arts has been under attack by the racists and opportunists who label anything from white people either as racist or as stolen by white people.