The document summarizes key events related to US imperialism following the Spanish-American War of 1898. It discusses how the US gained control of Cuba, Puerto Rico, Guam, and the Philippines from Spain. It also mentions how Theodore Roosevelt supported building the Panama Canal and used "Dollar Diplomacy" to expand US influence in Latin America. The document provides details on policies like ruling colonies, the Platt Amendment limiting Cuba's sovereignty, and the Open Door Policy regarding China.