There are many possible reasons but the two most common were christian missionaries who conducted religious missions all over the world in order to convert people, and the second being direct conquest like what Spaniards did in South American countries.
The significance of Marbury v. Madison was that it was the first U.S. Supreme Court case to apply "Judicial Review", as well as the fact that it allowed the Supreme Court to rule laws as unconstitutional.
Answer:
1. Yes, they did
2. Yes, he did
3. No, witnesses showed that Preston ordered the firing
4. Both sides are equally at fault
Explanation: