After having secured Fort Henry on February 6, 1862,General Ulysses Grant moved on with his mission across the country to invest Fort Donelson. The two sides engaged in counter attacks but Grant’s investment lines managed to bring the 12,000 –man garrison to surrender.
This was a catastrophe for the south but a vital win for Grant. It did not only pave the way for Kentucky to remain committed to the union but also opened up Tennessee so that the north could advance its troops.
This victory saw Grant promoted to the level of a major general and also earned stature in the Western Theater.
Henry Halleck approved Brig. Gen. Ulysses S. Grant’s plan to move swiftly to attack Fort Henry before Confederate reinforcements could arrive.