sentences:  General Truong flew to Saigon on 13 March to participate in a secret meeting with President Thiệu, Prime Minister Trần Thiện Khiêm and General Viên during which Trưởng was told about the evacuation from the Central Highlands and ordered to prepare a plan for the eventual evacuation of I Corps.He also was permitted to delay the first airborne brigade's departure to 18 March and the rest of the division until 31 March.Thiệu's reasoning was that Da Nang was most important, but that the rest of the region could be sacrificed.