Complex sentence: The Cherokee gave sanctuary to a band of Shawnee in the 1660s, but from 1710 to 1715 the Cherokee and Chickasaw, allied with the British, fought Shawnee, who were allied with the French, and forced them to move northward.
Split into simpler sentences: The Cherokee gave sanctuary to a band of Shawnee in the 1660s. But, from 1710 to 1715 the Cherokee and Chickasaw, allied with the British, fought Shawnee, who were allied with the French, and forced them to move northward.