What ways has the united states been able to exert a dominant position in the world, and also provide examples in which the united states has failed to dominate situations in spite of strenuous efforts.

its perfect how it was

they united the colonies in their fight against the british.

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.