Abigail's Peace (Forts of Refuge #3)
Pegg Thomas

Working at the fort, Koyengquahtah, a Seneca scout for the British army known as Koyen, watches the white women carried ashore from the boat. Soldiers are one thing, but women mean families. Families that plan to stay on Seneca land. It sparks in him a rebellion against the changes threatening to overwhelm his people and their way of life.
When Abigail befriends the sisters of Koyen, their paths cross and their initial distrust of each other grows into a grudging admiration. But violence erupts as two cultures clash, fueled by the Ottawa leader to the west, Pontiac.