In the lines 4, 18, 32, 48 and 61 Tecumseh uses the term " Brother"; he refers Tenskwatawa as his brother.
Step-by-step explanation:
He and his brother worked together to unify native Americans to struggle against the colonists as they expand towards westward.
Tecumseh and his brother started a campaign to persuade the Indians of the old northwest and deep south to unite and resist. They both tried a lot to unite Indian tribes against the white settlement.
Tecumseh along with his brother fought for the unity among the Americans and so that he uses the term " Brother".