Hanoi, July 6 -- Le made the call while addressing the launch ceremony of a search and recovery operation for the remains of fallen soldiers held at the Le Thi Rieng Cultural Park in Ho Chi Minh City on July 6.

The event is part of the country's ongoing 500-day campaign to search for, collect and identify remains of martyrs nationwide.

Investigations have led to the preliminary identification of several suspected mass graves believed to contain the remains of soldiers killed during the Mau Than Spring 1968 General Offensive and Uprising in the area now occupied by Le Thi Rieng Cultural Park in Hoa Hung ward.

The offensive, commonly known in the west as the Tet Offensive, was one of the largest military campaigns against the American mi...