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A common use of polyethylene is
Adams-Onís Treaty
An 1819 agreement between the United States and Spain that ceded Florida to the U.S. and defined the boundary between the U.S. and New Spain.
Louisiana Purchase
The Louisiana Purchase was a land deal between the United States and France in 1803, wherein the U.S. acquired approximately 827,000 square miles of land west of the Mississippi River.
49th Parallel
denotes the approximate boundary line between the United States and Canada, established in parts by the Oregon Treaty of 1846.
Missouri Admission
The process that led to Missouri becoming the 24th state of the United States in 1821, marked by debates over the extension of slavery into new territories.
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