The United States often makes aid decisions, both military and humanitarian, using the prism of our "strategic advantage."
So, if it would be advantageous to please a military dictator, either because of port access or drilling rights or the use of a base for refueling, it is likely that the aid will be used as an inducement to allow the United States to do those things.
The dating of artifacts is done by a three age system based on the development of tools and technology.
Answer: What two factors led to the growth of trans-Saharan trade? The two factors that led to the growth of trans-Saharan trade were the introduction of the camel and the spread of Islam. ... Travel across the Sahara was challenging because the journey was long and travelers could lose their way or be unable to find water.