I believe that this is an actual timeline but it also refers to the same people.
They are the 42,000 of Ephraim{Samaria} that were struck down when they couldn't pronounce shibboleth and they are the 42 of Ephraim who were torn in two by the two she bears
They are the 42,000 of Ephraim{Samaria} that were struck down when they couldn't pronounce shibboleth and they are the 42 of Ephraim who were torn in two by the two she bears