Military forces in the northern province of Hai Duong destroyed a 227-kilogram bomb leftover from the Vietnam War, the Vietnam News Agency reported.
The unexploded bomb was found deep beneath a rice field by local residents in Hai Duong City on Nov 29.
After residents informed authorities of the discovery, sappers arrived at the scene and unearthed the bomb before transporting it to another location. The bomb was later forced to explode.
About 6.6 million hectares (16.3 million acres) of land, more than 20 percent of the country's total surface area, has been affected by Unexploded Ordnances (UXOs) left behind by the Vietnam War, official figures show.
But only 300,000 hectares (740,000 acres) or 5 percent of the contaminated area has been cleared and UXOs continue pose a grave danger to residents all over Vietnam.
Experts have estimated that it would take hundreds of years and billions of dollars to clear Vietnam of leftover bombs, shells and mines.