The Green's functions of QCD encode the properties of hadrons,
with the appearance of (colour singlet) poles in n-point functions
corresponding to bound-states and resonances. There are several
techniques by which such information may be extracted, including
lattice QCD and functional methods. We discuss recent progress in
applying nPI effective action techniques to the systematic truncation
of Dyson-Schwinger and Bethe-Salpeter equations, with particular
emphasis on the spectrum of mesons and baryons.