What does external migration mean? The definition of external migration is migrating, or moving, to a new home in a different state, country, or continent. This is a form of human migration. Birds migrate a â¦ t specific times of the year and travel to other states or countries as the seasons change.
Fort Lewis was originally established in 1917 with the passage of a Pierce County bond measure to purchase 70,000 acres (280 km2) of land to donate to the federal government for permanent use as a military installation. A portion of the initial land was taken from the Nisqually tribe's reservation.
Three of these forts were located within (or close to) Lehigh CountyÃ¢â¬âFort Everett just south of the mountain in Lynn Township, Fort Franklin just north of the mountain in Schuylkill County, and Fort Lehigh overlooking the north entrance to Lehigh Gap in Carbon County.