Desire of the railroad companies to build rail lines on a deal of new land that open up to whether it was for the "free" or "slaves" .
There would be a less likely chance of war against America
Equal forces and no use of nuclear weapons.
After the initial invasion of the South by the North, UN forces under US leadership were able to push back forces into the North. However, China then entered the war creating a surge back toward the 38th parallel. With the US unwilling to use an atomic weapon, the countries were evenly matched and no one was able to make traction.
When they fought the Spanish for it
You can go Klondike only by the Yukon River, you can choose
upstream from its delta, downstream from its head, or from somewhere in the
middle through its tributaries. While it’s difficult to get to California;
forty-niners faced hardship and often death on the way. At first, most
Argonauts, as they were also known, travelled by sea. In the East Coast, they
sail around the tip of South America would take five to eight months and cover
some 33,000 kilometres and another way was to sail to the Atlantic side of the
Isthmus of Panama, take canoes and mules for a week through the jungle, and
then on the Pacific side, wait for a ship sailing for San Francisco. There was
also a way across Mexico it begins at Veracruz.
