Although portrayed as a positive movement to open the territory west of the Mississippi to westward expansion by Anglo settlers, the Indian Removal Act resulted in the brutal death of many natives who refused to go peacefully.
主要结构为open the territory to westward expansion；west of the Mississippi是the territory的同位语；to是介词，在此意思为“用于”；westward expansion为名词短语，指美国历史上著名的“西扩运动”。粗体部分大致意思为：盎格鲁定居者为了向西扩张，开放密西西比河以西的领土。
