How many years are there between 2000BC to AD1788?

Who benefited from the roman empires prosperity? What happened in 1508? In what ways did prince Henry help European exploration? How many times did the Israelites march around the wall of Jericho before it fell? The Columbian Exchange can trace its development to? What were the Muslims and Christians fighting over during the Crusades? What two emperors tried to restore the roman empire? What was the name of Vallejo cities founder? What was the most common way for European slave traders to acquire slaves to bring to the Americas? What did the desire to be released from feudal obligations cause? What best describes the impact of the crusades upon Medieval Europe? What is a Roman officer? Who are the First Nations in the western cordillera? What is the historical significance of Woman of Willendorf? How did technology encourage westward expansion? What did a watchmen wear in medieval times? Where did priests sleep in 1363? What is the duration of Middle Age Spread? What did Spartacus do? What are some historic facts about the western cordillera?