What tactics were used by slave masters to prevent slave uprisings?

slave owners would use  violence as a way of assuring and maintaining their the slaves and would try to make sure they didn't come together in large groups to prevent them from rebelling against the slave owners.

Explanation:

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.