Today In History: What Happened On Oct 31

★ National Unity Day or Rashtriya Ekta Diwas, ★ World Cities Day, ★ World Thrift Day, ★ 1875: Birth anniversary of iron man Sardar Vallabhbhai Patel, ★ 1895: Birth of CK Naidu, the first captain of the Indian Test cricket team, ★ 1943: Birth of Oomen Chandy, former CM of Kerala, ★ 1975: Death of Bollywood music director Sachin Dev Burman, and ★ 1984: Death of Ex-PM Indira Gandhi.