Indian removals as a topic primarily encompasses the relocation of Native American tribes from American-claimed states and territories east of the Mississippi River to lands west of the Mississippi River in the first half of the 19th century. The bill passed by Congress in May 1830 referred to as the Indian Removal Act is the legislative expression of the ideology upon which federal and state governments acted to accomplish the dispossession and relocation of tens of thousands of Native American peoples during that time. Through both treaty negotiations and coercion, federal officials used the authority of removal policies to obtain land cessions and resettle eastern Indians in what is known in the early 21st century as Kansas and Oklahoma. These actions, in conjunction with non-Indian population growth and western migration, made it extremely difficult, if not impossible, for any tribes to remain on their eastern lands. The Cherokee Trail of Tears, which entailed the forced removal of approximately fourteen thousand men, women, and children from Georgia starting in the summer of 1838 until the spring of 1839, remains the most well-known illustration of this policy and its impact. Yet the comprehensive histories of removals encompass the forced relocations of tens of thousands of indigenous men, women, and children from throughout the Southeast as well as the Old Northwest from the 1810s into the 1850s.