The United States fought in Vietnam because the northern half was communist and wanted to take control of the southern half.
Answer: Texas is a free and independent State, subject only to the Constitution of the United States, and the maintenance of our free institutions and the perpetuity of the Union depend upon the preservation of the right of local self-government, unimpaired to all the State
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The invasion from the mongols definitely a terrible event for the Russian culture, because Mongol held the principle to abolish all traditional culture in conquered land and replace it with the mongols.
In the beginning, the mongols' pressure defintely shake up the social unity of the Russian because they create the Greatest threat that ever faced by their society. But in the end, they managed to took back their land and defend against the attack.
