Environmental Encroachment (also known as "EE") is a Chicago-based marching band and performance art troupe. Its origins date back to 1994 with the mission to create site-specific adult playground installations. In its current incarnation, EE fuses traditional Latin and North African rhythms with folk, jazz, and rock melodies, along with incorporating circus antics, costumes, and dance, to provide a spectacle which has been described as “incomparable to anything in the world.”