Why were the crusades so important?

They were important to history because they spread christianity and expanded the territories of europe.

Answer sinking and cooled;

The zhou dynasty (1046-256 bce) was the longest-lasting of china's dynasties. it followed the shang dynasty (c. 1600-1046 bce) and it finished when the army of the state of qin captured the city of chengzhou in 256 bce.