What impact did the retreating union I may have on Northwestern and Central Louisiana after the red River campaign?

The Red River Campaign was a Union failure, the outcome of which did not have a major impact on the war.

Explain:

In the 1864 Red River Campaign, Union troops attempted but failed to surround Confederate forces in northwestern Louisiana. Governed by traditional naval law, Union ships could seize bales of cotton as a prize. The fact that the Red River's level was falling at a time when it should be rising should have aroused.