The second invasion of Tennessee by the army of Hood, rendered possible by the march of Sherman to the sea, appeared for the moment to threaten the control that had been secured of the all-important region of which Nashville was the centre, but Hood's march could only be described as daring but futile. He had no base and no supplies. His advance did some desperate fighting at the battle of Franklin and succeeded in driving back the rear-guard of Thomas's army, ably commanded by General Schofield, but the Confederate ranks were so seriously shattered that when they took position in front of Nashville they no longer had adequate strength to make the siege of the city serious even as a threat. Thomas had only to wait until his own preparations were completed and then, on the same day in December on which Sherman was entering Savannah, Thomas, so to speak, "took possession" of Hood's army. After the fight at Nashville, there were left of the Confederate invaders only a few scattered divisions. It was just before the news of the victory at Nashville that Lincoln made time to write the letter to Mrs. Bixby whose name comes into history as an illustration of the thoughtful sympathy of the great captain: "I have been shown in the files of the War Department a statement of the adjutant-general of Massachusetts that you are the mother of five sons who died gloriously on the field of battle. I feel how weak and fruitless must be any words of mine which should attempt to beguile you from the grief of a loss so overwhelming, but I cannot refrain from tendering to you the consolation that may be found in the thanks of the Republic they died to save. I pray that our Heavenly Father may assuage the anguish of your bereavement and leave you only the cherished memory of the loved and lost and the pride that must be yours to have laid so costly a sacrifice upon the altar of freedom."