Final answer:
The Spanish-American War was caused by the desire of the United States to intervene in the Cuban War of Independence against Spain. The war resulted in Cuba gaining independence and the United States acquiring territories from Spain. The Platt and Teller Amendments reflected the United States' desire to maintain control over Cuba after the war.
Step-by-step explanation:
The Causes and Effects of the Spanish-American War:
The Spanish-American War of 1898 was primarily caused by the desire of the United States to intervene in the Cuban War of Independence against Spain. The sinking of the USS Maine in Havana Harbor further fueled American public sentiment against Spain, leading to a declaration of war. The effects of the war included Cuba gaining independence, and the United States acquiring Puerto Rico, Guam, and the Philippines from Spain.
The sentiment behind the Platt Amendment was to maintain control over Cuba after the war. The amendment allowed the United States to intervene in the internal affairs of the island to protect its interests. Similarly, the Teller Amendment expressed the United States' intent not to annex Cuba and to recognize its independence.