Curated OER
Etc: Principal Routes of Trade and Migration, 1840 1850
A map of the United States between 1840 and 1850 showing the states and territories, and the principal routes of transportation and westward migration during the period. The map shows frontier forts, outposts, and settlements, the...
Curated OER
Etc: Development of Amer Interests in the Pacific, 1791 1903
A map of the United States and Pacific Ocean showing the development of American interests in the Pacific from the early exploration of Oregon Country in 1791 to the formal annexation of the Midway Islands and the Panama Strip in 1903....