Hello there,
What occurred after the Spanish introduced the horse to North America?
Answer: B. Plains Indians started hunting buffalo more efficiently.
I don't understand you question
The Treaty of Versailles caused long-term instability in Europe (and parts of Asia) by ignoring the nations who had lost WWI. The treaty didn't provide any support for the nations who had lost, creating resentment in the hearts' of their people. This disunity allowed for the rise of facist dictators post-WWI, eventually causing World War II.
The Siege of Vicksburg was so important because it allowed the Union to control the Mississippi River.
When the Union was able to take control of the Mississippi River, it essentially cut the Confederacy in half. Along with this, the Confederacy was now very limited on how it transported their goods, ammunition, and soldiers. The Mississippi River served as a constant source of travel for the Confederate soldiers.
The Siege of Vicksburg was the beginning of the end for the Confederacy.