The vast desert protected ghana from being conquered by who in the 700s

What does the document of the birtish octopus is an uderlying cause of the world war 1

What did woodie guthrie do before becoming a singer and song writer?

What was one of the most important causes of the russian revolution of 1917? a. the german occupation of russia during world war ii b. the bolsheviks execution of czar nicholas ii and his family c. csar nicholas ii refusal to withdraw from world war 1 d. the policy of ethnic discrimination put in place by the duma