Political upheaval in Germany caused people to seek freedom elsewhere wasn't the reason
Its considered one of the most important achievements of thomas jeffresons presidency.
It was the Boxer Rebellion which was anti-colonial, anti-foreign, anti-Christian movement and was violent. This started in 1899 and continued till 1901. It was started by The BOXER- <span>Militia United in Righteousness and was against the colonial system of the Europeans. </span>