Tyranny of individual states over the central government: What if states had the power to ignore a federal tax law they did not like?
This could be a problem because:

What would happen if the states had the power to ignore Federal tax law they did not like? If they ignore it it could temper with the economy if they choose to except the tax it could be income for those same people. ... Road island would barely have a say in any laws that were being made.

Explanation:

descendants of muhammed

here are some major conflicts i found. maybe pick one and do more research on it. (cause i ain't writing 6 paragraphs)

in 1877, the nez perce war took place.

1881 - president james garfield was assassinated.

1882 - the chinese exclusion act was passed.

1883 - a decision in the civil rights cases legalized racial segregation in the united states.

1887 - the dawes act was passed.

1893 - the panic of 1893 took place. (what a creative name)

and there are probably other topics you can find if you just search up "united states timeline," or "conflicts in the 19th century for america."

then once you find a topic you like find out how it affected the people of america and what not. (sorry if this feels a bit short changed, history was and never will be one of my strong topics)