Warmest Winter in History: More than 20 Cities Break or Tie All-Time Records. The winter of 2014-15 has been so exceptionally and persistently warm across the western third of the United States that more than 20 cities have tied or broken all-time records for the warmest meteorological winter (Dec. 1 through Feb. 28/29) on record.
The Louisiana Purchase occurred during the term of the third President of the United States, Thomas Jefferson, (1757-1826). Before the purchase was finalized, the decision faced Federalist Party opposition; they argued that it was unconstitutional to acquire any territory.
The Lewis and Clark Expedition to the Louisiana Purchase. Meriwether Lewis and William Clark led a government-sponsored expedition to explore the vast wilderness of the west soon after the signing of the Louisiana Purchase. The team, also known as the Corps of Discovery, left St. Louis, Missouri in 1804 and returned to the same spot in 1806.