Some had been members of left-wing organizations (such as the Arab Nationalist Movement), others were hitherto unorganized opponents of the Omani government.
[4] When it was publicly launched, NDFLOAG had branches in different towns in Oman and in most of the other parts of the Persian Gulf.
[1][4][5] NDFLOAG began guerrilla operations in northern Oman on June 12, 1970 attacking garrisons at the towns of Izki and Nizwa with mortars.
Afterwards several arrests were made, based on testimonies from prisoners from the Izki raid, and three NDFLOAG arms caches in Muti, Sur and Matrah had been stored was seized by the state forces.
[4] In December 1971 NDFLOAG and PFLOAG merged, forming the Popular Front for the Liberation of Oman and the Arabian Gulf,[9][10] although the two groups retained separate organizational structures.