Final answer:
The earliest military forts in Oklahoma were located in West Oklahoma. Therefore, the correct option is b).
Step-by-step explanation:
The earliest military forts in Oklahoma were located in West Oklahoma. Some of the forts in this region include Anadarko, Cantonment, Colony, Darlington, Muskogee, and Pawnee.
The earliest military forts in Oklahoma were primarily located in the western and southern regions of the state. Among the various forts established during the 19th century, notable locations include Anadarko, Cantonment, Colony, Darlington, Muskogee, and Pawnee. These strategic placements were important for a variety of reasons, including the enforcement of U.S. policies and regulations, the protection of settlers, and as a means to control the local Native American populations.
Therefore, the correct option is b).