Like other national literatures, American literature was shaped by the history of the country that produced it. For almost a century and a half, America was merely a group of colonies scattered along the eastern seaboard of the North American continent—colonies from which a few hardy souls tentatively ventured westward. After a successful rebellion against the motherland, America became the United States, a nation. By the end of the 19th century this nation extended southward to the Gulf of Mexico, northward to the 49th parallel