<span>The roots are mathematics physics astronomy biology and chemistry. </span>
<span>Congress approved $50 million that McKinley requested to prepare for war after C. the Maine exploded and sank in Havana Harbor.
Although it was unclear at the time what caused the explosion, the American immediately blamed Span after the Spanish minister to the US called President McKinley a weak leader. As a result, the President set aside a large sum of money in order to prepare for war with Spain.
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The answer is around 30 BCE
