The U.S. participation in the Eight-Nation Alliance during the Boxer Rebellion was significant because:

1. It resulted in the United States formally and permanently annexing the entire city of Beijing
2. It was the first time the U.S. joined an international coalition to intervene in an Asian country
3. It was the only recorded time in history that the U.S. and Russia fought together on the same side of a war
4. It forced the United States government to pay a massive annual tribute to the Qing Empress

Practice all 20 Open Door Policy questions