The first main reason was most of the market was based solely on credit, which was stock that was purchased without actual cash, but purchased on credit.
The second factor was the massive pull out by many investors due to a panic that caused the Banks to attempt to purchase these stocks leading to a complete collapse in the market.
The answer is existing European colonies.
HOPE THIS HELPS!<span />
1. sectionalism was the main cause of the civil war. the southern states seceded from the Union because they didn't want President Lincoln to free their slaves.
2. The Southern was devasted because it couldn't its agriculture products to the North or overseas. The Northen economy thrived on its manufacturing
3. the bureau provided assistance to tens of thousands of former slaves and impoverished whites in the Southern States