Yes. there were more events leading up to the crash
The U.S. government openly stated that they would view any European interference in Latin America as "an act of aggression". This was articulated clearly in the Monroe Doctrine, which stated that the US would respond with military force.
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The people of Maryland had a long tradition of slave-holding andties to the south. They wanted to secede from the Union, butPresident Lincoln would not allow it. Maryland surrounded thecapital of the US on three sides and if they seceded, the capitalwould have to secede also.