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Boxer rebellion
President Woodrow Wilson agreed to send 15,000 troops to North Russia and Siberia.
Poland
No, they were Orthodox
Brazil did send a division in World War II. It was equipped by the US and served in Italy.
Boxer rebellion
51 times
Haiti and the Dominican Republic had internal political and economic problems.
to support U.S. trade goals by helping to preserve China as a nation.
to protect america
William Pitt sent his troops to North America to battle the French. Pitt wanted full control of North American and in order to have that he needed to send the French out.
Lafayette.
monroe doctrine
Hitler did not send troops to the future.
America asked them to. That answers half the question - the British government was also asked to send troops but refused. Come on, some older Australians, give the real reason.
William Pitt sent his troops to North America to battle the French. Pitt wanted full control of North American and in order to have that he needed to send the French out.
I am not aware that he has - please check the veracity of your source of information in relation to this.