In 1957 eisenhower used the arkansas national guard to what?

He used the National Guard to allow African American students to enter the Central High School in Little
Rock, Arkansas.  To achieve this, Eisenhower federalized the National Guards who were being used by Governor Oval Faubus to prevent them from entering the school.  By doing so, Black students can now take part in class.

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity