Answer:
Well, why would <em>you</em> think its not important? Is there a specific reason you would think it is not important? It's really tough to answer things like this because it really depends on your own opinion.
Nickname comes from his mentor, Andrew Jackson, who was called Old Hickory. Polk entered Congress in 1824, when Jackson won the popular, but not the electoral vote to John Quincy Adams. When Jackson won both, in 1828, Polk became his protege.
The United States of America won/drew the revolutionary war with the help of France Spain Dutch republic and the British (yes the British also helped the US)
The American Federation of Labor (AFL) was a national federation of labor unions in the United States founded in Columbus, Ohio, in December 1886 by an alliance of craft unions disaffected from the Knights of Labor, a national labor association.