What was unique about the establishment of Fort Gibson?

Fort Gibson was established in 1824 to keep the peace between the Osages and Cherokees. It figured prominently in the Indian removals and was home to many of our nation's leaders during the 1840s and 1850s. Fort Gibson served as a starting point for several military expeditions that explored the West.

Fort Gibson was established in 1824 to keep the peace between the Osages and Cherokees. It figured prominently in the Indian removals and was home to many of our nation's leaders during the 1840s and 1850s. Fort Gibson served as a starting point for several military expeditions that explored the West.

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).

i believe your answer is d)