Page:Resources LibraryArrow iconCurriculum:Building a Self-Governing People: Civics & US History for Middle SchoolArrow iconUnit:Unit 7: American Expansion (1830-1860)Arrow iconLesson:Geography and History: A Map-Based InquiryMajor Railroads as of 1869 MapA map showing railroads in 1869. This map is used in the lesson Geography and History: A Map-Based Inquiry.