How did the vikings contribute to the developments of the ninth and tenth centuries?

- Trade/Commerce- The Vikings undertook extensive trade and built a trade network that eventually covered all of modern Europe, Russia, the Middle East, Northern India, and even China.
-Technology/Society- They mastered the construction and sailing of the longship. were also masters of the art of weapon forging and weapon embellishment who were able to create swords, spears, javelins, battle-axes, knives, bows, arrows, shields, and body armor with intricate designs
-Art/Architecture- The Vikings were well known for their art which included metalworking, wood crafts and carvings, horn and bone crafts, pottery, glass, and literature