  We study strings between static quarks in QCD with $n_f$ adjoint fermions,
including $N=1$ Super Yang-Mills (SYM), in the calculable regime on $\mathbb
R^3\times \mathbb S^1$. We find that they have many qualitatively new features
not previously known. The difference from other realizations of abelian
confinement is due to the composite nature of magnetic bions, whose Dirac
quantum with fundamental quarks is two, and to the unbroken part of the Weyl
group. In particular we show that strings are composed of two domain walls,
that quarks are not confined on domain walls, that strings can end on domain
walls, and that "Y" or "$\Delta$" baryons can form. We briefly discuss their
lightest modes and decompactification limit.
