  Experimental and theoretical realizations of jets in high energy collisions
involve an ordered collection of particle groupings or splittings. Recent p+p
measurements of the wide-angle, early-time jet splittings show consistency with
theoretical calculations while subsequent later-time splittings hint at
deviations from the theory. We study splittings along a jet tree in vacuum
representing the perturbative QCD, transition, and non-perturbative QCD
regions. With a specially selected resolved splitting, we highlight its
apparent disagreement with pQCD predictions and discuss its features.
