Authors like ernest hemingway and f. scott fitzgerald often wrote and reflected on what event?

The event will be the Spanish Civil War. (At least for Ernest Hemingway)
They wrote about war

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

The freedmens bureau   disturbing supplies