This caravan would be an average week’s business, just in the Rio Grande Valley Sector.
500 apprehended per day is routine there (more presumably avoid capture).
What is new, is the large percentage that identify themselves as family units with children (from Central America, rather than Mexico), who are so logistically difficult to hold in confinement.
BP's estimate is that they only catch 8-10% of all illegal invaders that cross our borders