Why have historians only recently solved some of the secrets of early african civilizations?

Who proposed the corwin amendment in early march of 1861

Select all that apply. identify two reasons for the fall of the ming dynasty. invasion by the japanese and koreans death of the emperor invasions poor leadership

Why was the united states motivated to establish the open door policy? a. the policy guaranteed american commerce with china. b. the policy supported the chinese nationalist cause. c. the policy led to a gain of american colonies in asia. d. the policy claimed damages from the chinese.