In what way did the United States fail to keep the promise to Spain

Answer 1

The United States failed to keep its promise to Spain when it annexed the former Spanish colonies of Puerto Rico, Guam, and the Philippines after the Spanish-American War. The US had promised to respect the sovereignty of Spain over its colonies, but instead annexed them and made them US territories. This annexation was a violation of the 1898 Treaty of Paris, which ended the war and stipulated that Spain would retain sovereignty over its colonies.