Why were real companies in a hurry to complete many miles of track laying in the mid-1800s?

The rail companies were in a hurry to complete track laying in the mid-1860s because they wanted to connect the Union to California which was experiencing rapid growth which was largely due to the California Gold Rush which had seen many people move to California. This made California an important part of the United States

here are some events that to cause increased conflict between the north and south

1) mexican cession- gaining modern day california, utah, arizona, and new mexico from mexico. caused southern and northern politicians to fight over whether or not there would be slavery in these newly acquired territories.

2) uncle tom's cabin- this famous book described the cruelty of slavery in the south during the antebellum period, causing more northerners to support abolition and southerners to resent the book as they felt it unfairly depicted southern society.

3) kansas- nebraska act- disagreements over whether or not kansas and nebraska would be free or slave states caused issues between northern and southern politicians in congress.

4) bleeding kansas- this fighting took place in kansas after congress allowed this territory to vote on whether or not they would have slavery. citizens were killed and buildings were destroyed during this fighting.

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.