  We study dynamics of two-dimensional N=(0,1) supersymmetric gauge theories.
In particular, we propose that there is an infrared triality between certain
triples of theories with orthogonal and symplectic gauge groups. The proposal
is supported by matching of anomalies and elliptic genera. This triality can be
viewed as a (0,1) counterpart of the (0,2) triality proposed earlier by two of
the authors and A. Gadde. We also describe the relation between global
anomalies in gauge theoretic and sigma-model descriptions, filling in a gap in
the present literature.
