How is the city of Savannah related to the Union strategy of a full blockade of Confederate ports?

Savannah was a critical Confederate port city during the Civil War, serving as a key supply line for the Confederacy. The Union's strategy of a full blockade aimed to cut off these supply routes, thereby crippling the Confederate economy and military capabilities. By blockading Savannah, the Union sought to prevent the transport of goods and troops, ultimately contributing to the weakening of the Confederate war effort. The successful capture of Savannah in December 1864 marked a significant victory for the Union, further tightening the blockade's efficacy.