  We construct a gauged linear sigma-model representation and develop a
1/N-expansion for flag manifold sigma-models previously proposed by the author.
Classically there exists a zero-curvature representation for the equations of
motion of these models, which leads in particular to the existence of a
conserved non-local charge. We show that at the quantum level this charge is no
longer conserved and calculate explicitly the anomaly in its conservation law.
