How did tribal locations within Oklahoma influence their decisions to support the Union or the Confederacy?

They thought it was "The Better Choice"  because of its opposition to a central Federal System, which had lacked some respect for the Indian nations. 6 Tribes thought different from this reason.

Explanation:

an effect of the steamboat's popularity was that people began building canals in the united states and europe. this was done to find another way to transport goods across the country and in that time, transportation using the river was very slow and dangerous. it depended entirely on manpower and the current of the river. that all changed in the late 1700's when steamboats were introduced. they soon revolutionized travel and trade through the river and dominated the waterways. eventually, other means of transportation took over from the steamboats, but there was a time that they the united states to expand to the west.

the answer is suffrage