Which of these was a major factor in the outcome of the mexican american war in the mid-1800s?
a) the mexican army was using superior weaponry.
b) the united states troops were greatly outnumbered.

true.

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the decreasing neutrality of the u. s. in world war i

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the federalist party which advocated strong centralization dominated the united states government till 1800. so 1800 election transformed the power from one party to another party for the first time and was thus a turning point in american history. so jefferson called it "revolution of 1800".

explanation: