What did men do that didn’t want to work for low wages & how did factory owners replace them?

By hiring immigrants

Explanation:

Immigrants from Europe were taken to replace the workers who were not willing to work in low wage. Immigrants were taken to work in the factory as they were desperate to work for money. Life was hard for the factory workers where their rights were not heard by the factory owners and managers. They were forced to work in the unhygienic condition in low wages for long shift or hours.

answer; taking up arms to defend the nation;

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation: