Slavery in America started in 1619, when a Dutch ship brought 20 African slaves ... in North America turned to African slaves as a cheaper, more plentiful labor ...
Answer:
The war officially ended with the February 2, 1848, signing in Mexico of the Treaty of Guadalupe Hidalgo. The treaty added an additional 525,000 square miles to United States territory, including the land that makes up all or parts of present-day Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming
Explanation:
Of which war do you speak..?
My answer is for the United States.
Briefly, the bill has to pass both the Senate and the House of Representatives and it must not be vetoed by the president. That is how something becomes a federal law.
A state law is much the same way except the governor takes the place of the president. If there is only 1 house in the state then it goes from the house of representatives to the Governor who has 10 days to veto it. Nebraska is the only state without a senate.