Conversation so far:
What happened on the santa fe trail with Kit Carson?
Kit Carson went west with a caravan of fur trappers, tending their livestock. They made their trek over the Santa Fe Trail to Santa Fe.
did Kit Carson and the caravan of fur trappers who trekked over the Santa Fe Trail have problems along the way?

Question: why did they travel there?
Self-contained rewrite: why did Kit Carson and travel west with a caravan of fur trappers, tending their livestock to trek over the Santa Fe Trail?