  We study the dynamics of a confining vacuum in N=2 USp(4) gauge theory with
n_f=4. The vacuum appears to be a deformed conformal theory with nonabelian
gauge symmetry. The low-energy degrees of freedom consist of four nonabelian
magnetic monopole doublets of the effective SU(2) colour group, two dyon
doublets and one electric doublet. In this description the flavour quantum
number is carried only by the monopoles. We argue that confinement is caused by
the condensation of these monopoles, and involves strongly interacting
nonabelian degrees of freedom.
