What technological innovation changed the oil industry in the mid-1800s? How did this change encourage the
growth of industry in general?

How did the united states surprise other delegates at the washington naval conference in 1921

Describe how father de mora lost the gold

How did african americans the union during the civil war? a. by serving as representatives in congress b. by enlisting in the military to fight c. by organizing massive slave revolts in the south d. by negotiating for peace with the confederacy