Increasing or increased in quality, degree, or force by successive additions.
I think deleting first person will make it sound more professional
The last sentence uses abbreviations appropriately.
As a Native American myself i would say,
The new US Government was careful not to antagonize the Indians and sought to treat them with mutual respect. This is evidenced in early treaties where the term “Red Brothers” was used to convey this sentiment of equality. By 1800 interaction between the Indian and white settlers had become quite common through trade. Many Indians traded for household goods, traps and tools. The US became concerned about the cultural differences and sought to improve the Indian station in life by providing education. The United States no longer feared the Indian but rather took a paternal position toward the Indians and the treaty language reflected this when the Indian was referred to as “Our Red Children.”
