These are the elementary reasons for the migration of African Americans to the north. Segregation was very pronounced in the South. A huge number of African Americans have experienced some discrimination in the South. A large number of that population were lynched, so living conditions were impossible. In such circumstances, economic reasons were the cause-effect relationship. A society that discriminates against the population because of skin color did not provide even the minimum economic conditions.
I am not 100% on this so you may want to fact check my response:
Lusitana - it was torpeded by German U-Boats and it sank in 18 minuntes... i also believe it was a passenger ship which also really upset the US submarine- new