What were the causes of world war 1 and how did the war progress on the western front?

What mountain range is located near 60*n and 60*e

Which best describes the impact of the crusades on european exploration?

Which statement best describes standard oil in the late 1800s? standard oil controlled only a small number of the nation’s oil refineries. standard oil was a single business that operated in a small region. standard oil controlled only the means and methods of oil production. standard oil owned ninety percent of all oil refineries in the united states.