 South Vietnam's main defensive assets in and around Phước Long included five security battalions and forty-eight platoons of civilian self-defence forces.The defence of Phước Long was the responsibility of ARVN Lieutenant General Dư Quốc Đống.The 341st and 352nd Security Battalions were tasked with the defence of Don Luan, the 363rd Security Battalion stationed at Bu Na, the 362nd Security Battalion guard the main roads from Vinh Thuan to Bu Dang, and the 340th Security Battalion was placed in reserve at Phước Long district.