Which historical event does the beginning of the anglo-saxon period roughly correspond with? a. the norman invasion of britain b. the viking invasion of britain c. the roman pull-out from britain d. the battle of hastings

president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers