What innovation or invention made suspension bridges possible?

Several strands of metal twisted creating a durable string, that's the "wire rope", made of high carbon steel, and galvanized to improve corrosion resistance; a key structure together with "the web truss" when it comes to assembling suspension bridges;

but "The Bessemer process" was the fundamental industrial method for manufacturing and mass production of steel, invented by English engineer Sir Henry Bessemer.

Explanation:

the answer would be 50's sitcoms reinforced traditional roles for men and women.

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)