While Washington's troops were on their way to Trenton they would go across very frozen lakes and rivers in small boats and had to walk miles upon miles after this. This did pay off though, the rivers essentially trapped the British into having them surrender, along with the high ground the Americans had.
The American Revolution occurred, because the colonists were tired of being mistreated, with heavy taxes imposed on them, having to quarter unneeded troops in their own houses, and not having as much freedom, that they decided that it was best to break away from the British Empire The Massacre at Boston proved to be one of the last straws.
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Answer 1: The Immigration Act of 1924 was made: it limited the overall number of immigrants and established quotas based on nationality. Among other things, the act sharply reduced immigrants from Eastern Europe and Africa.
Answer 2: John Scopes was arrested and prosecuted for his teaching on evolution, which was illegal in Tennessee, where he was teaching.