What event happened after the union army victory at fort donalson?

After the Union Army's victory at Fort Donelson in February 1862, General Ulysses S. Grant gained significant momentum, leading to the capture of Nashville shortly thereafter. This victory marked a crucial turning point in the Civil War, as it opened up the pathway for Union forces into the Confederate heartland, and bolstered Northern morale. The success also solidified Grant's reputation as a formidable military leader.