A diplomatic incident between the United States and Chile occurred after U.S. sailors were attacked in Valparaíso, nearly leading to war.

The Baltimore crisis was a diplomatic incident that took place between Chile and the United States, after the 1891 Chilean Civil War, as a result of the growing American influence in the Pacific Coast region of Latin America in the 1890s. It marked a dramatic shift in United States–Chile relations. It was triggered by the fatal stabbing of two United States Navy sailors from USS Baltimore in front of the "True Blue Saloon" in Valparaíso on October 16, 1891. The United States government demanded an apology. Chile ended the episode when it apologized and paid a $75,000 indemnity.

The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States also asserts sovereignty over five major island territories and various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's third-largest land area and third-largest population, exceeding 340 million.

Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, stretching along a narrow strip of land between the Andes Mountains and the Pacific Ocean. Chile had a population of 17.5 million as of the latest census in 2017 and has a territorial area of 756,102 square kilometers (291,933 sq mi), sharing borders with Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage to the south. The country also controls several Pacific islands, including Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island, and claims about 1,250,000 square kilometers (480,000 sq mi) of Antarctica as the Chilean Antarctic Territory. The capital and largest city of Chile is Santiago, and the national language is Spanish.