Francis Garni was a military one that contributed to the nation's twenty. He set out to survey and mapping the terrain of southern China. Northern Vietnam and the first edition of the map Garni A. This is very important. Because this land of the world has never been explored before. The first official survey of the Mekong River. Which borders Thailand attached. Curve shows the Mekong River near the city of Khan in Loei province, which is displayed on the map, even today a map of Garni. Secretary of the Navy has become a textbook of French strategic battle to Siam.
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