In 1862 and early 1863, both the Union Navy and Army

In 1862 and early 1863, Union forces made several attempts to take Vicksburg, a Confederate stronghold on the Mississippi River, but those efforts failed. The Union did not capture the city until July 1863, after the Vicksburg campaign. New Orleans had already fallen to Union forces in 1862, so the choices about failing to capture it or winning a battle there do not fit.

AI-written and checked against the verified answer.