The attempt to incorporate the NLF into the FLOSY exposed a rift among the NLF’s ranks, between the Qawmiyyūn supreme leadership and the Front’s lower ranking leaders and rank and file. The attempt at unity with the OLOS was not, in itself, the rift’s cause, but rather the last straw. The rift actually stemmed from deep-rooted and bitter grievances against the Qawmiyyūn elements. Most of the information available is found in sources hostile to the NLF; the Front itself managed quite successfully to conceal the internal rupture till the end of 1965. However, there is hardly any doubt about its existence and gravity.