Before the Sith showed up the IK would search for Force sensitive kids from within the Empire and train them. Sometimes when soldiers would show potential to use the force then they would be recruited as well. So basically it was kind of similar to the Jedi style back then. But since the Sith took over the IK have been in hiding, so we have knights all over the galaxy and if they find a prospective student they might take them on as a squire. So we have a bigger catchment area now, but lower intake.