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Mexico–United States border, including Pacific Ocean and Gulf of Mexico. Land boundaries defined by the 1819 Adams–Onís Treaty (with Spain), 1828 Treaty of Limits, 1848 Treaty of Guadalupe Hidalgo, 1854 Gadsden Purchase, and Boundary Treaty of 1970. Ocean boundaries defined by bilateral treaties in 1970, 1978, and 2001. [1] Contiguous ...
The Canada–United States border is the longest international border in the world. [a] The boundary (including boundaries in the Great Lakes, Atlantic, and Pacific coasts) is 8,891 km (5,525 mi) long. The land border has two sections: Canada's border with the contiguous United States to its south, and with the U.S. state of Alaska to its
The international border states are those states in the U.S. that border either the Bahamas, Canada, Cuba, Mexico, or Russia. With a total of eighteen of such states, thirteen (including Alaska) lie on the U.S.–Canada border, four lie on the U.S.–Mexico border, and one has maritime borders with Cuba and The Bahamas.
The United States shares land borders with Canada and Mexico and maritime borders with Russia, Cuba, the Bahamas, and many other countries, mainly in the Caribbean [note 2] in addition to Canada and Mexico. The northern border of the United States with Canada is the world's longest bi-national land border.
The Southern U.S. states of Texas, Louisiana, Mississippi, Alabama, and Florida, which border the gulf on the north, are often referred to as the "Third Coast" of the United States (in addition to its Atlantic and Pacific coasts). The Gulf of Mexico took shape approximately 300 million years ago (mya) as a result of plate tectonics. [5]
Canada–United States border (10 C, 156 P) Cuba–United States border (5 P) I. Border irregularities of the United States (2 C, 34 P) M.
The United States has notably increased measures taken in border control on the Canada–United States border and the United States–Mexico border during its War on Terrorism (See Shantz 2010). One American writer has said that the 3,600 km (2,200 mi) US-Mexico border is probably "the world's longest boundary between a First World and Third ...
In the United States, border security includes the protection of ports, airports, and the country's 3,017-mile (4,855 km) land border with Canada and 1,933-mile (3,111 km) border with Mexico. Central to U.S. national security , border security incorporates responses to issues such as terrorism , illegal immigration, smuggling , and human ...