The correct answer would be the border dividing the Chinese Han Dynasty and Xiongu.
In 200 BC, the Chinese Han Dynasty invaded Xiongu territory in order to take it over and control it. However, they were defeated, and had to withdraw from the battle.
On the other hand, there were also attacks from Xiongu in Chinese territory. After Han's defeat in Baideng, a peace treaty was reached. This conflict is known as The Battle of Baideng.
The Treaty of Guadalupe Hidalgo led to the establishment in 1889 of the International Boundary and Water Commission to maintain the border, and pursuant to newer treaties to allocate river waters between the two nations, and to provide for flood control and water sanitation.
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Although women played a vital role in providing for their families, economic opportunities remained limited. During the early 1800s, an additional job opportunity arose for women -- factory work. Most Ohio men had no desire to work in factories under the direction of another man.
( D ) Unmarried women in the lower class worked in service jobs.
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<span>About 1/3 of Europe died over the course of 2 years. Some towns and villages became completely deserted due to plague victims and people fleeing the plague. When the plague finally burnt out, there was a much higher demand for labor than there was supply. This meant greater wages and rights for the peasants who would eventually do this work.</span>