What is the Main Branches of History?

What was a pence worth in 1814? What were baseball player Lou Gehrig's batting stats for 1938? Why was a medieval village a better place than a medieval town? Why did the Aztecs sacrifice hearts? How do west africans dress differently than Americans? Who was the main war hawk in congress? What was the aristocracy known as in ancient rome? Why is it important to respect a senior nco? The Largest desert in Africa? Lee's army was allowed to escape after a bloody battle at where? What major city does the Kokoda Track go through? How did Frederick Douglass escape slavery? How did the American Indian and Alaska Native population compare with the total population? Why is technology so great? How did the US strike at the caribebean? Did the ancient Greeks have yams? What were sewers like during 20th century in Scotland? What is the carolingian empire? When and where did the Battle of Leningrad occur? Where does 'nutritional yeast' come from?