The Baltimore and Ohio Marching Band was an American musical ensemble active during the late 1960s and early 1970s. Their musical style combined elements of pop, soul, and marching band aesthetics, creating a unique sound that set them apart in the music industry. While the group did not have any standout members, they were notable for their large ensemble size and the incorporation of brass instruments in their arrangements. Their most influential work, "Condition Red", became a Northern Soul classic.