Tension arose in the frontier territory where natives and settlers attacked each other.
The term "frontier" refers to the border or outer edge of a settled area, especially where it meets unclaimed or sparsely populated lands. In the context of the sentence, tension arises in the frontier territory where conflicts occur between native inhabitants and settlers. These conflicts often involve disputes over land, resources, and cultural differences, leading to mutual attacks and hostilities. The term "frontier" is commonly used in historical contexts to describe regions undergoing expansion and settlement, where interactions between different groups can be complex and contentious.