Released in April 1969 under the original name Chicago Transit Authority, this debut album introduced the band’s powerful blend of rock, jazz, and brass-driven arrangements. Featuring standout tracks such as “Does Anybody Really Know What Time It Is?”, “Beginnings,” and “Questions 67 and 68,” it showcased the group’s signature horn section and complex musicianship. The success of this record launched Chicago as one of the most innovative and enduring rock bands of the 1970s, bridging pop accessibility with sophisticated jazz-rock artistry.