The role of the First Nations people in the battle of York was to fight against Americans. The battle of York was part of the War of 1812, where the First Nations warriors played important roles in defending British territories against American forces. First Nations people sided with the British during the war because both resist American expansion in Northern America (Canada).
Some name of names of the warriors were John Brant (Mohawk War Chief), John Norton (Six Nations War Chief).
John Brant Brant played an active role as war chief and warrior. He also played a significant role in the war along with John Norton.
John Norton recruited Six Nations and Delaware warriors in war.
Slavery viewpoints played a major role in the Democratic Party split. Slavery in itself is for of injustice where one overpowers the other. It emphasizes that there's definitely a split among people.