War Plan Orange
On June 21, 1898, the United States captured Guam in a bloodless landing during the Spanish–American War. By the Treaty of Paris, Spain officially ceded the island to the United States. Guam became part of an American telegraph line to the Philippines, also ceded by the treaty; a way station for American ships traveling to and from there; and an important part of the United States' War Plan Orange against Japan. Although Alfred Thayer Mahan, Robert Coontz, and others envisioned the island as "a kind of Gibraltar" in the Pacific, Congress repeatedly failed to fulfill the military's requests to fortify Guam; when the German warship was interned in 1914 before America's entry into World War I, its crew of 543 outnumbered their American custodians.