What geographic feature formed the boundary to the western part of the United States before the Louisiana Purchase?

What are the 4 main reasons to provide information

In 1073, the fight over who gets to choose bishops was between pope gregory vii and king henry the iv. t or f

What were the three outstanding events in 1619 that had a great influence on the colonies? representative government came to america. the first slaves were brought to america. the first governor was elected. the london company sent women to america. john rolfe developed a money crop-tobacco. next question ask for