What did the emancipation proclamation allow african americans to do?
a. serve in the confederate army
b. purchase land from confederate soldiers
c. serve as soldiers in the union army
d. build schools and churches for the children of parents in the army

How did the cleveland massacre impact standard oil in 1872? standard oil hired all the laborers who were nearly killed during the cleveland massacre. standard oil became a monopoly in the cleveland oil market after the cleveland massacre. standard oil was bought out by other companies in the city after the cleveland massacre. standard oil closed down to avoid additional violence in the wake of the cleveland massacre.