The union blockade during civil war lead to

A 1861 characterized map of the Union blockade, known as Winfield Scott's Anaconda Plan. The Union blockade in the American Civil War was a naval strategy by the United States to prevent the Confederacy from trading.

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