According to some historians which marks at the beginning of the us civil war

A lot of historians believe the battle of Fort Sumter was the start of the war, as it was the first official battle. However, there were zero casualties.

A lot of other people believe when Lincoln was elected was the start, because that event led many southern states to secede very quickly.

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.