How does the judicial branch of government serve the purposes set forth by the preamble

What change took place in the african slave trade in the 1500's?

What is the term of the negotiated that recognized both british and american claims in the northwest? joint controljoint occupationjoint mandatejoint agreement

1. discovered the new world balboa 2. explored the north american southwest hudson 3. his crew was the first to sail around the world vespucci 4. conquered the incas of peru cortes 5. discovered the pacific ocean columbus 6. conquered the aztecs of mexico cabot 7. discovered fishing grounds off newfoundland pizarro 8. looted spanish vessels for england drake 9. claimed the hudson river area for dutch coronado 10. priest who explored the mississippi marquette 11. man for whom the new world is named magellan