sentences:  Under the terms of the peace treaty from which Cuba was excluded, Spain ceded Puerto Rico, the Philippines, and Guam to the U.S. in exchange for $20 million.Cuba came under U.S. control and remained so until it was granted formal independence in 1902.The "Big Brother" policy was an extension of the Monroe Doctrine formulated by James G. Blaine in the 1880s that aimed to rally Latin American nations behind US leadership and open their markets to US traders.