Answer:
<em>D. They served as spies and scouts. </em>
Explanation:
African Americans did all they could to help the Union army. This was especially true after the Emancipation Proclamation, as Lincoln attempted to free slaves from the control of Confederate states.
This was one of the many reasons why African Americans in the South helped Union forces. These citizens often acted ignorant or didn't appear to be paying attention when Southerners discussed their next military moves. African Americans would then relay this information to the Union commanders, giving them a strategic advantage.
Answer:
it was useful because this could have helped with navigation purposes, for example, traveling from country to country by sea
Answer:
Over the centuries, the Great Wall has been built and rebuilt for three main purposes: as kingdom border defenses, to defend China's northern border, and for tourism.
Explanation:
