I think trenches had zigzag patterns because they could make people had a better aim at shot and more protection.
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10 percent before the cival war
The result was that tariffs were lowered which bothered lobbyists but had great support from the public. The trusts were slowly beginning to end because of the Federal Trade Commission Act of 1914 and Clayton Anti-Trust Act of 1914 that was meant to end monopolies in businesses. The banks were reformed with the Federal Reserve Act of 1913 which is still used today, only modified.