“Ever since the head of the Movement of the Taliban in Pakistan, Hakeemullah Mehsud, was killed in a US drone strike in late 2013, the al Qaeda-linked group has been plagued by leadership disputes, infighting, and defections. Mullah Fazlullah, Mehsud’s successor, has proven to be incapable of holding the coalition of jihadists together. “
Source: Discord dissolves Pakistani Taliban coalition – The Long War Journal