Complex sentence: The most serious clashes erupted in late January 2012, when Bani Walid was hostilely taken over by locals on 23 January due to the NTC's perceived inability to compensate with them.
Split into simpler sentences: The most serious clashes erupted in late January 2012. On 23 January, Bani Walid was captured by local fighters due to the NTC's perceived inability to cooperate with them.