text: The following year, the club was renamed CDNA (Central House of the People's Army), and the years between 1954 and 1962 marked one of the most successful periods for the Reds, who won nine consecutive titles (an unprecedented achievement in Bulgarian football at the time and a record the club held for 60 years) and, in 1956, took part in the second installment of the newly created European Cup competition, reaching the quarter-finals.
  1960s
  In 1962, CDNA was merged with DSO Cherveno Zname to form CSKA Cherveno Zname ("CSKA Red Flag"). The Central House of the People's Troops ceased its affiliation with the club, which was taken over by the Ministry of People's Defense. CSKA finished third after Spartak Plovdiv and Botev Plovdiv in the 1962–63 season. The following season, CSKA had its worst performance in the Bulgarian championship to date, finishing 11th in the final table, only three points from relegation. This led to the sacking of legendary coach Krum Milev after 16 years at the helm.
  CSKA did not recapture the title until 1966. However, during the 1966–67 season, CSKA recorded its first major international achievement, reaching the semi-finals of the European Cup for the first time, where they faced Italian giants Inter. After two hard-fought 1–1 draws, a third decisive match was played, which CSKA lost 0–1.