sentences:  The Brigade swept the area for several days and then returned to the My Chanh Line.On 28 May President Thieu promoted Division commander Colonel Bui The Lan to Brigadier General at the Imperial City, Huế.From 11 to 18 June the Division and the Airborne Division conducted probing attacks to test PAVN strength ahead of the launch of General Trưởng's Operation Lam Son 72 to recapture Quảng Trị Province.