How are mercenary troops different from the military today?

Explanation:

Mercenary, hired professional soldier who fights for any state or nation without regard to political interests or issues. From the earliest days of organized warfare until the development of political standing armies in the mid-17th century, governments frequently supplemented their military forces with mercenaries. A SOLDIER  a person who serves in an army.

the world may never know

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.