Only era can vary in length of time.Era means age,period which doesn't exactly define the time
Century=100 years
decade=10 years
millennium = 1000 years,
The answer is D. One of his greatest accomplishments was bringing about an end to the Russo-Japanese War
Answer:
Slavery divided Americans from the beginning, but Americans demonstrated a shrewd ability to maintain unity in spite of division. In the 1770s, all of England’s North American colonies employed slave labor. Enslaved workers grew food, cultivated cash crops, worked in ports, and manufactured goods.. By November 1860, an opponent of slavery’s expansion arose from within the Republican Party. During the secession crisis that followed in 1860-1861, fears, nearly a century in the making, at last devolved into bloody war. (