son Ubaidallah) split to join the Ba'ath-sponsored National Progressive Front. 1974–75 war With approximately 50,000 trained peshmerga and possibly another 50,000 irregulars at his disposal, Mulla Mustafa was confident in the face of an Iraqi military assault. Against such a force Baghdad could deploy 90,000 troops, but importantly backed by over 1,200 tanks and armored vehicles, and 200 aircraft. With Iranian, as well as covert American and Israeli support, the Peshmerga were able to combat the technologically superior Iraqi army. Iranian support ended when it reached an agreement with Iraq during the OPEC Conference in March 1975, encouraged by the United States, culminating in the 1975 Algiers Agreement. Unable to continue receiving ammunition for its anti-air and anti-armor weaponry, Mulla Mustafa ordered the KDP to begin retreating to avoid repercussions from the Iraqi Army. 200,000 Kurdish refugees fled to Iran, and there were somewhere in the region of 20,000 casualties on each side After its suppression of the armed resistance, the Ba'ath razed at least 1,400 villages to create a security belt along the Turkish and Iranian borders. At least 600,000 civilians were deported to collective "re-settlement camps", with anyone caught trying to abandon these camps being executed on the spot. The Iraqi government also used this opportunity to settle demographic scores in their favor – resettling Kurds from disputed territories and moving in Arab families in their place. The Ba'ath even offered financial incentives to Arabs who took Kurdish wives. Under Saddam Hussein In the wake of their defeat during the 1974–1975 War, Mustafa Barzani and his sons Idris and Masoud fled to Iran. The power vacuum they left behind was thus filled by their ideological nemesis Jalal Talabani, who, together with his leftist supporters announced in Damascus the formation of the Patriotic Union of Kurdistan (PUK). Despite the terrible hardships suffered by the Kurds as a whole, intra-Kurdish feuding did not cease following the 1974–1975 war, as KDP groups ambushed and killed PUK fighters on several occasions in 1976–1977. Talabani vowed revenge, and at various moments ordered his troops to fire upon any KDP troops – but suffered from operational weaknesses compared to the KDP. Feuding and splitting continued throughout the late 1970s, as the KDP, PUK, and KDP-I jostled for influence and funding from neighboring states. At the commencement of the Iran–Iraq War, Saddam Hussein was able to publicly boast that "the Kurdish organizations would never be