<Tr> <Th> 1939 </Th> <Td> </Td> <Td> 240.2 </Td> <Td> 0 </Td> <Td> 240.2 </Td> <Th> 1970 </Th> <Td> 21 </Td> <Td> 449.8 </Td> <Td> 1,881.8 </Td> <Td> − 1,432 </Td> </Tr> <Tr> <Th> 1940 </Th> <Td> </Td> <Td> 0 </Td> <Td> 209.5 </Td> <Td> − 209.5 </Td> <Th> 1976 </Th> <Td> 6 </Td> <Td> 49.2 </Td> <Td> 0 </Td> <Td> 49.2 </Td> </Tr> <Tr> <Th> 1941 </Th> <Td> 6 </Td> <Td> 224.5 </Td> <Td> 246.9 </Td> <Td> − 22.4 </Td> <Th> Total </Th> <Td> 245 </Td> <Td> 17,712 acres (71.68 km) </Td> <Td> 11,662 acres (47.19 km) </Td> <Td> 6,050 acres (24.5 km) </Td> </Tr> <Ul> <Li> In 1927 under the same 1905 Convention, the U.S. acquired two bancos from Mexico at the Colorado River border with Arizona . Farmers Banco, covering 583.4 acres (2.361 km), a part of the Cocopah Indian Reservation at 32 ° 37 ′ 27" N 114 ° 46 ′ 45" W ﻿ / ﻿ 32.62417 ° N 114.77917 ° W ﻿ / 32.62417; - 114.77917, was ceded to the U.S. with controversy . Fain Banco (259 acres (1.05 km)) at 32 ° 31 ′ 32" N 114 ° 47 ′ 28" W ﻿ / ﻿ 32.52556 ° N 114.79111 ° W ﻿ / 32.52556; - 114.79111 also became U.S. soil . </Li> <Li> Proposed: Based on aerial surveys in 2008, there are 138 cases where the widest channel of normal flow of the Rio Grande has shifted from previous surveys . Therefore, the International Boundary Line is to be changed under Article III of the 1970 Boundary Treaty . The result is 138 proposed transfers of territory that remain pending further evaluation and approval by the International Boundary and Water Commission and the two governments . Upon resolution, the U.S. is to cede 7 islands and 60 cuts in the Rio Grande to Mexico, totaling 1,251.2 acres (5.063 km), while Mexico is to cede 3 islands and 68 cuts to the U.S., totaling 1,275.9 acres (5.163 km). </Li> </Ul>

How did the united states expand its territories around the world