Why might nations want to retain or develop an arsenal or nuclear, biological, and chemical weapons?

Create a top 5 list of events related to westward expansion that affected african americans the most list of event: missouri compromise compromise of 1850 kansas nebraska act dred scott v sand ford fugitive slave act nat turners rebbelion bleeding kansas harpers ferry explain why you made your 1 on the list number order from most impact to least impact

What was the plight and fight of the following groups? labor farmers native americans african americans women immigrants ~ ap u. s. history (period 6: 1865-1898)

Which events are correlated but do not necessarily have a causal relationship?