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Mexican War (apr 25, 1846 – feb 2, 1848)

Description:

This war marked the first U.S. conflict fought on foreign land. Mexico lost about one-third of its territory including almost all of present-day Nevada, New Mexico, California, Arizona and Utah. This was caused by having an unprepared military and being politically divided.

Added to timeline:

Date:

apr 25, 1846
feb 2, 1848
~ 1 years and 9 months