When did John d Rockefeller start standard oil?

Pre 1964 Half dollars? What does the name graybacks refer to as it was used by troops from both sides in the civil war? Which coin has Susan B. Anthony's face on it? Did they have typewriters in the 1830's? What sacrifices were made for America to have freedom? What is the connection between Colonization the Enlightenment and White Supremacy? Which American Civil War took place in July 1863? Did original pledge of allegiance include under God? When was Sacagaweas daughter born? What is the source of Cotton Mather's slaves' names? Was stonewall in the confederacy? Did Vermont ever secede? How much is a 1776 1976 silver dollar coin worth? What are three reasons why the 13 colonies wanted to be free of great Britain? What was the location in the south where 13000 were captured union soldiers died? In what present day states was Indian territory located? What did the 19th century Americans value? Which was the first legislative act that was created to end monopolies and regulate businesses? The freedom riders were organized to draw attention to the south's refusal to? Where did the name sawyer come from?