Early in the conflict, the Viet Minh's sabotage attempts failed to seriously damage the French railways, and most trains circulated without much protection. Beginning in 1947, however, the Viet Minh began to use mines, with circulation slowing to a crawl as they became more and more powerful.  In response, the French began using the armed armoured train La Rafale as both a cargo-carrier and a mobile surveillance unit.   In February 1951 the first Rafale was in service on the Saigon-Nha Trang section of the North–South line,   manned by the 2nd Foreign Infantry Regiment ( French Foreign Legion ). Use of the Rafale failed to deter the Viet Minh, however, who continued sabotaging the line, making off with its rails under cover of night and using them to create a 300-kilometre (190 mi)-long clandestine rail network between Ninh Hoa and Da Nang, in a Viet Minh-controlled area.  In 1954, following the signature of the Geneva Accords and the end of the First Indochina War, Vietnam—along with its railway system—was divided along the Bến Hải River in Quảng Trị Province .   
Sorry to hear about that. I also had an issue with my application when I mailed it because there was no mention of the $10 processing fee. Unfortunately the Vietnamese govt doesn’t seem to care to clearly spell out their policies or update them whenever they change. If I were traveling to Vietnam in less than a month’s time…I would definitely not apply for something like a Visa Exemption which requires you to mail in your passport. You can never be sure anything will get done in time…whether it is the VN government or the .
In 20000 BC, before the first history was recorded in writings, there had been already among people the legends and mythology about the origin of Viet nation from HUNG VUONG. These are stories on HONG BANG dynasty, offspring of dragon and fairy, bag of hundred eggs, eighteen kings of Hung Vuong dynasty, Son Tinh - Thuy Tinh's conflict, Thanh Giong's victory over An foreign aggressors, folk of betel and areca nuts, "banh chung banh day", watermelon ..... All these legends together can be regarded as a folk history. These historic legends were firstly collected and compiled by the contemporary authors' view. The two symbolic works of this aspect were Viet Dien U Linh by Ly Te Xuyen with a foreword in 1329, and Linh Nam Trich Quai by Tran The Phap in around end of Tran (1226), then edited by Vu Quynh and Kieu Phu in Le era (1428) with prologue in 1492-1493. According to one of the numerous legends concerning the origin of their state, a Vietnamese prince named LAC LONG QUAN came to Northern Viet Nam from his home in the sea. He married a princess from the mountain, AUCO, who is also described as the wife of a Northern Intruder (Chinese?), on the top of Mount Tan Vien, sometimes around 2800 BC Instead of the commonplace results of a union, the princess laid 100 eggs - when they hatched, a son emerged from each of them. Afterward, the parents separated because he was dragon from the sea, she was lady fair from the mountain. Therefore, the mother led half the progeny across the northern mountains, and became the ancestors of the Muong. While the remaining fifty followed the father to the sea and became ancestors of the Vietnamese. The most valiant of the sons was chosen to be the first of the eighteen HUNG VUONG kings. Lac Long Quan, a prince of the sea, and Au Co, a princess of the mountains, are regarded by the Vietnamese as their primal ancestors. Chu Nguyen
Tai lieu tham khao: Lich su Viet Nam & Trials and Tribulations of a Nation