What are the eastern fronts during world war 1?

In 1816, john c. calhoun proposed that: a. that the federal government aid in the construction of roads and canals to improve transportation to and from the west b.the united states should end slavery. c.the united states should increasing the size of the navy and invade central america. d. the united states should annex hawaii

Iron making developed in china almost a thousand years later than in the middle east. true false

What change took place in the african slave trade in the 1500's?