Soon after the Civil War ended in eighteen sixty-five, thousands of Americans began to move west to settle the land. The great movement of settlers continued for almost forty years. The great empty West, in time, became fully settled. The discovery of gold had already started a great movement to California.
Congress had to approve of military appointments. The War Powers Resolution was made so that the President of the United States could not commit to an armed conflict without the consent of the Congress.
Protections against arbitrary acts of the government are technically known as A. civil liberties. An example of a civil liberty is the right to practice whichever religion you please.