Ba Ria-Vung Tau, March 10 -- An exhibition has unveiled rare archival materials dating back to the 19th century, providing compelling evidence of Vietnam's historical sovereignty over Hoang Sa (Paracel) and Truong Sa (Spratly). For the first time, the display includes Nguyen Dynasty royal administrative documents and woodblocks, recognised by UNESCO as World Documentary Heritage. Launched on March 10 at Brigade 171 in Vung Tau city, Ba Ria-Vung Tau province, the exhibition is divided into two sections: "Hoang Sa, Truong Sa - Sacred Seas and Islands" and "Heroic Vietnam People's Navy - 70 Years of Maritime Defence Journey." The display features nearly 200 invaluable documents, maps, and photographs sourced from the National Archives Centre...