Unions sought to improve workers’ pay and working conditions by hiring security guards to keep costs low.
setting up an apprentice system.
negotiating with employers.
working together in company towns.

Plz ! after the first battle of bull run general ivan mc dowell was removed from command of the union army he was replaced by a. general ulysses s. grant. b. general george mcclellan. c. general robert e lee. d. general george meade.