History: Photos Of American Pioneers, United States

Historic details and episodes
• History of settlement efforts
The first westward migrations occurred as representatives of the Thirteen Colonies sought to open up new lands for their respective colonies westward. Those whose original royal charters did not specify a western limit simply extended their lands directly and indefinitely westward.
After the United States was formed upon the ratification of the U.S. Constitution, federal coordination and legislation began to give settlement a more unified approach.