A result of humans' increased dependence on the land and fears of scarcity—to a decline in nutrition and a rise in infectious diseases
The United States had millions of dollars invested in businesses in Cuba and there were many U.S. citizens in residence there. The U.S. also traded goods with Cuba.
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To give debtors from Britain a fresh start
Mexico had declared its independence from Spain. With that being said, Spain had a war that lasted 11 years with them. After one town had declared independence, they started to spread as they had recruits coming in from everywhere. Finally, a Spanish soldier had joined in 1820 and brought an army to Mexico city, eventually capturing it.
One year later, Spain agreed to terms.
