Explain how trade between méxico and the united states developed

Before the end of Spanish rule in 1821, trade between Mexico and the United States was not allowed. After 1821, Mexico and the United States traded a lot.

Explanation:

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Second

Mexico, the United States, and Canada signed the North American Free Trade Agreement (NAFTA) in 1994 with the goal of eliminating barriers to trade and investment. ... The US is Mexico's largest trading partner, accounting for close to half of all exports in 2008 and more than half of all imports in 2009.

answer-the island had airfields that the u.s. military needed.

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