Arizona states of Sonora and Baja California. Arizona is the 48th state and last of the contiguous states to be admitted to the Union, achieving statehood on February 14, 1912, coinciding with Valentine's Day. Historically part of the territory of "Alta California" in New Spain, it became part of independent Mexico in 1821. After being defeated in the Mexican–American War, Mexico ceded much of this territory to the United States in 1848. The southernmost portion of the state was acquired in 1853 through the Gadsden Purchase. Southern Arizona is known for its desert climate, with very hot summers and mild winters.
United States Mission to the European Union United States Mission to the European Union The United States Mission to the European Union (USEU) is the diplomatic mission of the United States to the European Union; it is based in Brussels, Belgium. The US has maintained diplomatic relations with the EU and its predecessors since 1953. The first predecessor of the current mission was the US diplomatic mission to the European Coal and Steel Community in Luxembourg, which opened in 1956. In 1961, the US Mission to the European Communities was established in Brussels, which later became the United States Mission to the European Union, upon the latter's