String Dual of N=1 Super Yang-Mills on the Cylinder

We study the stringy description of N=1 supersymmetric SU(N) gauge theory on R^{1,2}xS^1. Our description is based on the known Maldacena-Nunez solution, properly modified to account for the compact dimension. The most interesting of its properties is that extra BPS M-branes are present, which generate a non-perturbative superpotential that we explicitly compute.