What spread across the trans Saharan caravan trade route

Which statement best describes a major advantage of a confederal system of government over a unitary system

Explain the reasons for u. s. neutrality during the 1920s and 1930s. how did ideas about neutrality change during the period from the end of world war i to the passage of the lend-lease act? be sure to include any events, terms, or people that may support your response.

Why were the bay of pigs invasion and cuban missle crisis even major events in the kennedy presidency