  The Chiral Soliton Lattice (CSL) is a state with a periodic array of
topological solitons that spontaneously breaks parity and translational
symmetries. Such a state is known to appear in chiral magnets. We show that CSL
also appears as a ground state of quantum chromodynamics at nonzero chemical
potential in a magnetic field. By analyzing the fluctuations of the CSL, we
furthermore demonstrate that in strong but achievable magnetic fields, charged
pions undergo Bose-Einstein condensation. Our results, based on a systematic
low-energy effective theory, are model-independent and fully analytic.
