Explanation:
The main reason for this was slavery. The US did not want to annex Texas because doing so would have upset the balance between slave states and free states that had been accomplished with the Missouri Compromise of 1820. When Texas became independent, it wanted to join up with the United States.
Irish monasteries became famous for their learning and many students came to study in them from other parts of Europe. Irish monks also spread Christianity across Europe.
The main reason why such a large portion of the population during this time in the United States shifted from rural to urban areas was because industrialization had created many more employment opportunities in the city factories.
The U.S did not enter the war until after the Japanese bombed the American fleet in Pearl Harbor, Hawaii,on December 7, 1941