The Yuan dynasty was not officially proclaimed until 1271 by Kublai Khan. One of their many traditions were about expanding the dynasty in the traditional Chinese style. At the time China was imbalanced in standing of government, meaning the western most parts of China were separately ruled and had different outlooks on the situation. It was written than Genghis Khan founded the dynasty. So in other words I think they took to more of the foreigners who were coming to live their because the two sides had different outlooks. I'm not 100% sure if this would fully answer your question. But I hope it helps.
There are many things that Bush emphasized as a top us foreign policy objective, but he was most known for "fighting the war on terrorism" which led to lots of strikes overseas.
