 Here, there were not only bronze weapons, axes, and personal ornaments, but also sickles and other agriculture tools.Toward the closure of the Bronze Age, bronze accounts for more than 90 percent of tools and weapons, and there are exceptionally extravagant graves – the burial places of powerful chieftains – containing some hundreds of ritual and personal bronze artifacts such as musical instruments, bucket-shaped ladles, and ornament daggers.After 1000 BC, the ancient Vietnamese people became skilled agriculturalists as they grew rice and kept buffaloes and pigs.