Unit Five TextA lI. Related Informat 1.1 the colonies of the east coast: the 13 settlements in the east coast of the US which formed the original United States Pioneer Americans/ the Frontier Settlers: In american history, the frontier was the westernmost at any given time in the expansion of the nation. Historians assume that the process of extending the frontier westward bean in 1607 with the settlement of Jamestown and ended around 1890. when there was no longer any new land for homesteadersUnit Five Text A 5 II. Related Information: 1.1 the colonies of the east coast: the 13 settlements in the east coast of the US which formed the original United States. 2 Pioneer Americans/ the Frontier Settlers: In American history, the frontier was the westernmost at any given time in the expansion of the nation. Historians assume that the process of extending the frontier westward bean in 1607 with the settlement of Jamestown and ended around 1890, when there was no longer any new land for homesteaders