In short, Germany was close to being defeated, and America wanted to be part of the post war carve up (when territory was divided). The US was supplying war materials to the Allies and could not do so while maintaining complete neutrality. There was also the sinking of the British ship Lusitania which angered the US. Also, the Zimmerman telegram.
That America will always win
The Speaker of the House is next in line because the House of Representatives was traditionally seen as the "people's house" or the most Democratic house. It wasn't until the early 20th Century that the Senate was elected by the people directly, so the leader of the more Democratic house was a fairer pick in the line of succession.
Answer:
Northern Ireland
Explanation:
Although not technically a country, Northern Ireland is the only major piece of land within the United Kingdom outside of The island of Great Britain, and is usually listed with the other countries.
Useful technology, engineers,and strong willed people. In the end, the US won.