Hanoi, July 13 -- The use of archival materials is providing a great help in the 500-day campaign to intensify the search for, recovery and identification of martyrs' remains, offering renewed hope to families that have spent decades seeking their loved ones, Tran Viet Hoa, Director of the National Archives Centre No. III under the State Records and Archives Department of the Ministry of Home Affairs told the Vietnam News Agency. Hoa said the centre preserves a vast collection relating to war invalids, martyrs and cadres deployed to the southern battlefields (B-zone), including personal files and policy documents that reflect the Party and State's approach to people with meritorious service over different periods, including records showin...