After the Spanish-American war, America was given Cuba, <span>Puerto Rico, the Philippine Islands, and Guam as parts of the treaty. Cuba however did not become a part of the US territories as it became an independent country.</span>
Radicals attacked the U.S. Embassy in Tehran and took hostages in the 1970's.
The exact year is 1979.
Some of the pull factor codes were things like the Homestead acts which were a series of acts on land allocation. For example, if you went westwards, the country would give you a huge piece of land which would become fully yours after five years of successful agricultural business.
b ) The ships were at the mercy of the weather
The journey from Africa to the West Indies or North America Usually took about two months. However, the journey would take longer due to vagaries of bad weather that made navigation challenging
The West Indies was what the islands are sometimes called to this day, this came from the (false) belief that Columbus has discovered Asia/India.