Throughout the 1820s, Austin sought to maintain good relations with the Mexican government, and he helped suppress the Fredonian Rebellion. He also helped ensure the introduction of slavery into Texas despite the attempts of the Mexican government to ban the institution.
Dr Jonas Salk developwd the vaccine to prevent polio.
It moved military forces through a neutral country
Relatives to people who are already here is the answer in this question. People who are already in the country and earn much money to make their family lives immigrate to that country because their life will be stable. So the relative of the person who are already in that country is the reason why there has a large number of immigrants.
The British won the French and Indian war, but in the end, the problems still came back to them. Colonial tension, and the Treaty of Paris made it worse, and aggravated Indians, because the "provisions" that were made for peace shortened their concerns to 1%.
