A set of laws, passed in the midst of fierce wrangling between groups favoring slavery and groups opposing it, that attempted to give something to both sides. The south gained by the strengthening of the fugitive slave law, the north gained a new free state, California. Texas lost territory but was compensated with 10 million dollars to pay for its debt. Slave trade was prohibited in Washington DC, but slavery was not.
A, B, and C. Mesopotamia was in the middle of a desert, and the only reason it was farmable was because it lay between the Tigris and Euphrates rivers which flooded yearly to water the ground.
The Pawnee is a Native American tribe in Nebraska and Kansas. But in 1874, they've been moved to Oklahoma. They used to serve the Army against the European expansion.
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The first migrants came 65,000 years ago