As general terms, Indian Territory, the Indian Territories, or Indian country describe an evolving land area set aside by the United States Government for the relocation of Native Americans who held aboriginal title to their land. In general, the tribes ceded land they occupied in exchange for land grants in an area purchased by the United States federal government from Napoleonic France, the Louisiana Purchase. The concept of an Indian Territory was an outcome of the 18th- and 19th-century policy of Indian removal. After the Civil War, the policy of the government was one of assimilation.
The indigenous Aborigines have recently received an apology from the "Australian" government, since years of colonization led to great human abuses against the native people.
Cuneiform was the written system of the c)Sumerians. Cuneiform is one of the earliest systems of writing and is generally "written" in a wedge-shaped style. It took many years for people to translate these texts and it is known that these were lists people kept to keep track of their domesticated animals in their agricultural territory.
The Mexican Cession happened in 1848. In this treaty, Mexico handed over Texas to the US. Hope this helps.