Tigris and Euphrates is the answer
Answer:
There were five original Iroquois Nations; in the early 1700s, the Tuscarora joined the Confederacy as the sixth.
Explanation:
The given sentences are ''There were five unique Iroquois Nations. In the mid 1700s, the Tuscarora joined the Confederacy as the sixth.''.
The most ideal approach to join these two sentences is as per the following:
There were five unique Iroquois Nations; in the mid 1700s, the Tuscarora joined the Confederacy as the 6th.
