 Just before noon the 20th Tank Regiment received a frantic message from Headquarters, I Corps, ordering it to return to Quảng Trị.Since no explanation was given, Major General Nguyen Van Toan, Chief of Armor, and his American adviser, Colonel Raymond R. Battreall, Jr., flew to Quảng Trị to see General Vu Van Giai, the 3rd Division commander.There they learned that the western fire bases near the DMZ had been overrun in a preclude to what was apparently a major PAVN offensive.