  Unitarity corrections to the BFKL description of high energy hard scattering
are viewed in large $N_c$ QCD in light-cone quantization. In a center of mass
frame unitarity corrections to high energy hard scattering are manifestly
perturbatively calculable and unrelated to questions of parton saturation. In a
frame where one of the hadrons is initially at rest unitarity corrections are
related to parton saturation effects and involve potential strengths $A_\mu
\sim 1/g.$ In such a frame we describe the high energy scattering in terms of
the expectation value of a Wilson loop. The large potentials $A_\mu \sim 1/g$
are shown to be pure gauge terms allowing perturbation theory to again describe
unitarity corrections and parton saturation effects. Genuine nonperturbative
effects only come in at energies well beyond those energies where unitarity
constraints first become important.
