Why did new problems about the spread of slavery
come up after the Missouri Compromise?

The Missouri Compromise created new problems dealing with slavery since it divided America even further and let in Missouri as a slave state and Maine as a free state which balanced out the US Senate. This led to more tension between people who believed and did not believe in slavery. It ultimately led to Bleeding Kansas and pushed America toward the Civil War by adding wood to fire the fire of sectionalism in the US and creating much more tension between the states.

Explanation:

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although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.