aiming at Đức Huệ base camp. Hiếu employed twenty mobile battalions to surround the Parrot's Beak area. Secondly, on April 27, he launched 49th Infantry Regiment and 7th Ranger Group through the swamp lands around Đức Huệ towards the Cambodian border, and had Republic of Vietnam Air Force airplanes attack positions of PAVN 5th Division units. In the meantime, he relied on two Regional Force battalions belonging to IV Corps to move from Mộc Hóa up north to establish blocking positions on the southwestern edge of the PAVN 5th Division's logistical base and assembly area. On 28 April, Hiếu launched eleven battalions into the battleground to conduct preliminary operation in preparation of the main offensive. The next morning, three armored squadrons of the III Corps Assault Task Force rushed across the Cambodian border from Gò Dầu Hạ, aiming directly at PAVN 5th Division HQ. Meanwhile, a task force composing of infantry and armor of IV Corps, originating from Mộc Hóa, maneuvered across the Cambodian border into the Elephant's Foot area to threaten the retreat of the PAVN 275th Regiment. The three armored squadrons continued their three-pronged advance 16 kilometers deep into the Cambodia before they veered south toward Hậu Nghĩa, and helicopters dropped troops unexpectedly on PAVN positions, while other ARVN units conducted rapid operations into the region between Đức Huệ and Gò Dầu Hạ. On 10 May, when the last ARVN units returned to their base camp, enemy communications and supplies networks were seriously disrupted. The PAVN suffered 1,200 killed, 65 prisoners, and tons of weapons captured; while, due to speed, secrecy and coordination factors of a multi-faced operation, the ARVN suffered less than 100 casualties. Anticorruption czar Vice President Trần Văn Hương appointed General Hiếu anticorruption czar on 10 February 1972. He occupied this position until October 1973. At that time corruption was rampant among the ARVN leadership, in the army, the administration, the police, the power authority, Air Vietnam, customs, etc. General Hiếu chose to attack first the Military Pension Fund. After a five-month investigation, he presented his findings in detail on the national television on 14 July 1972. As a result, the Defense Minister, General Nguyễn Văn Vy and seven colonels were ousted and the Military Pension Fund disbanded. Hiếu was not allowed to move on to other corruption targets. President Thiệu limited Hiếu's investigative authority and prior presidential approval was necessary to commence an investigation