balkanise

/B AO1 L K AH0 N AY0 Z/
verb
  1. 1

    To break up into small, mutually hostile units, especially on a political basis.

Source: https://en.wiktionary.org/wiki/Balkanize, https://en.wiktionary.org/wiki/balkanise, https://en.wiktionary.org/wiki/balkanize