Complex sentence: While the Vikings are best known for accumulating wealth through plunder, tribute, and conquest, they were also successful traders and established several trading centers and long distance trade routes during the Viking Age (793 AD to 1066 AD).
Split into simpler sentences: While the Vikings are best known for accumulating wealth through plunder, tribute, and conquest, they were also successful traders. The Vikings developed several trading centers and long distance trade routes during the Viking Age (793 AD to 1066 AD).