1964 – 65 Yugoslav First League had an odd number of teams because FK Vardar was allowed to compete in the top league despite getting relegated the previous season . The state and FA authorities made this decision due to the major earthquake ( 6.1 Richter scale ) that hit Skopje on 26 July 1963 . The thinking was that having a team in top-flight would boost the citizens ' morale
earthquake
1963 Skopje earthquake
1964–65 Yugoslav First League