Most European countries were angered with the Monroe Doctrine the United States implemented especially the countries and empires part of the Holy Alliance after the Napoleonic war. But due to insufficient power and naval forces to implement the doctrine most countries disregard the threat.
Calvinism is basically Protestantism, but since John Calvin played a huge role in Calvinism, it is named after him. The people who practiced Calvinism, often believed they were "chosen" by God to like on their life and do what they are told. They thought that God had picked them to make a perfect Christian community, as they had lived good and true lives so they were hand chosen by God himself. They trusted in the fact that if they did this and created a pure Christian community, while living a happy life with no sin, they would earn salvation from God.
Jackson never liked the natives so he put together the Texas rangers to protect citizens from the Native Americans
The following statements which best describes the massacre at Sand Creek in 1864 is that many of the American Indians who were killed were women and children. The Sand Creek Massacre happened during the American Indian Wars in Colorado when a militia of seven hundred men killed and mutilated seventy to one hundred and sixty-three (mostly women and children) people living in peaceful Native American villages.
In the period 1865 to 1910, the immigrants faced many challenges and also embarked in the opportunities available to them in the North and the West. The main challenge was related to job hunting. I hope my answer has come to your help. God bless and have a nice day ahead!