In those years, Gaddafi's support had been mostly moral, with only a limited supply of weapons. All this started changing in February 1977, when the Libyans provided Oueddei's men with hundreds of AK-47 assault rifles, dozens of RPGs, 81 and 82mm mortars and recoilless cannons. Armed with these weapons, the FAP attacked in June the Chadian Armed Forces' (FAT) strongholds of Bardaï and Zouar in Tibesti and of Ounianga Kébir in Borkou. Oueddei took full control of the Tibesti with this attack after Bardaï, besieged since 22 June, surrendered on 4 July, while Zouar was evacuated. The FAT lost 300 men, and piles of military supplies fell into the hands of the rebels. Ounianga was attacked on 20 June, but was saved by the French military advisors present there.