They were more afraid of slavery. and hard labor they would have to do , and they might get killed.
The Gulf of Tonkin Resolution allowed President Johnson to send troops to Vietnam, thus waging a war without actually "declaring" it as war. Checks and balances keep the power divided and balanced among government branches; it is the duty of Congress to declare war, so President Johnson waging war without the declaration of war by Congress breaks this system.
The Battle of Antietam was the bloodiest one-day battle of the Civil War, with over 25,000 casualties total. It was a Union victory, which raised the confidence of Union troops. After a long winning streak, the Confederate troops lost and were forced back.
If you are talking about the Second Industrial Revolution, then the person who had a monopoly in the steel industry was Andrew Carnegie.
Hope this helps!