Which event convince the united states to enter world war 1 on the side of the allies 1. assassination of archduke franz ferdinand 2. overthrow of the russian tsar 3. election of woodrow wilson 4. sinking of lusitania

That would have to be 4. Sinking of Lusitania (This very boat was used as part of the address to Congress the president made to ask them to go to war.)

4, the sinking Lusitania

It developed as a reaction to the impact of european colonialism in africa on peoples of african descent. in the  mid-20th century, activists in africa adopted pan-africanism as a rallying cry for independence from colonial rule. some african pan-africanists sought to unite the continent as one independenthope it was useful