B. Thirty Years War. This war was rejected by the European balance-of-power principle. The Thirty years war was a war over religion and killed 30% of Germany's population. The treaty that ended this war was Peace of Westphalia.
The Indian Removal Act of 1830 implemented the U.S. government policy towards the Indian populations, which called for moving Native American tribes living east of the Mississippi River to lands west of the river.
