Why did britain begin interfering in the colonies affairs in 1763?

Because the want the colonialist to pay their national debt.

After a long war with Spain and France, victorious Great Britain had gained a vast global empire. The Treaty of Paris, signed in February 1763, brought an end to the world war and to the French Empire in North America. However, this war left the empire with a huge national debt. The British government started a project to force colonialist to pay higher taxes, or in other words, a "fair share" of the military expenses. Those new policies of taxes and acts led to a constant growth of resistance by the colonialists. In a final analysis, those were the very genesis of all American movements of independence.

the decreasing neutrality of the u. s. in world war i

hope this : )

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)