sentences:  The highly developed Đông Sơn culture that flourished in North Vietnam (from about 1000 BC to the 4th century BC) was the civilization responsible for the world-famous Đông Sơn drums, a product of their advanced bronze-casting skills.These drums give us an important peek into early Vietnamese life.They were elaborately decorated with geometric patterns, and most importantly, depicted scenes of everyday life such as farming, warriors donning feather headdresses, construction of ships, musicians, etc.