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.
Fort Lewis began as Camp Lewis in 1917 when the citizens of Pierce County voted by an eight to one margin to bond themselves for $2 million to buy 68,721 acres (278 kmÂ²) of land. They donated the land to the federal government for military use. The only stipulation was that the tract be used as a permanent army post.