  In the context of M-theory, Witten has argued that an intriguing phenomenon
occurs, namely that QCD strings can end on domain walls. We present a simpler
explanation of this effect using effective field theory to describe the
behavior of the Polyakov loop and the gluino condensate in N = 1 supersymmetric
QCD. We describe how domain walls separating distinct confined phases appear in
this effective theory and how these interfaces are completely wet by a film of
deconfined phase at the high-temperature phase transition. This gives the
Polyakov loop a non-zero expectation value on the domain wall. Consequently, a
static test quark which is close to the interface has a finite free energy and
the string emanating from it can end on the wall.
