What caused the workers to have a meeting and rally in Haymarket Square?

The May 4, 1886, rally at Haymarket Square was organized by labor radicals to protest the killing and wounding of several workers by the Chicago police during a strike the day before at the McCormick Reaper Works. ... Chicago Mayor Carter Harrison was even in attendance to ensure the protest was peaceful.

Explanation:

a

"the land of the dead"

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.